Update pip-tools to 5.5.0

[pyup-bot]

This PR updates pip-tools from 1.9.0 to 5.5.0.

Changelog

5.5.0

Features:
- Add Python 3.9 support
([1222](https://github.com/jazzband/pip-tools/pull/1222)). Thanks jdufresne
- Improve formatting of long "via" annotations
([1237](https://github.com/jazzband/pip-tools/pull/1237)). Thanks jdufresne
- Add `--verbose` and `--quiet` options to `pip-sync`
([1241](https://github.com/jazzband/pip-tools/pull/1241)). Thanks jdufresne
- Add `--no-allow-unsafe` option to `pip-compile`
([1265](https://github.com/jazzband/pip-tools/pull/1265)). Thanks jdufresne

Bug Fixes:
- Restore `PIP_EXISTS_ACTION` environment variable to its previous state
when resolve dependencies in `pip-compile`
([1255](https://github.com/jazzband/pip-tools/pull/1255)). Thanks jdufresne

Dependencies:
- Remove `six` dependency in favor `pip`'s vendored `six`
([1240](https://github.com/jazzband/pip-tools/pull/1240)). Thanks jdufresne

Improved Documentation:
- Add `pip-requirements.el` (for Emacs) to useful tools to `README`
([1244](https://github.com/jazzband/pip-tools/pull/1244)). Thanks jdufresne
- Add supported Python versions to `README`
([1246](https://github.com/jazzband/pip-tools/pull/1246)). Thanks jdufresne

5.4.0

Features:
- Add `pip>=20.3` support
([1216](https://github.com/jazzband/pip-tools/pull/1216)). Thanks atugushev and AndydeCleyre
- Exclude `--no-reuse-hashes` option from «command to run» header
([1197](https://github.com/jazzband/pip-tools/pull/1197)). Thanks graingert

Dependencies:
- Bump `pip` minimum version to `>= 20.1`
([1191](https://github.com/jazzband/pip-tools/pull/1191)). Thanks atugushev and AndydeCleyre

5.3.1

Bug Fixes:
- Fix `pip-20.2` compatibility issue that caused `pip-tools` to sometime fail to
stabilize in a constant number of rounds
([1194](https://github.com/jazzband/pip-tools/pull/1194)). Thanks vphilippon

5.3.0

Features:
- Add `-h` alias for `--help` option to `pip-sync` and `pip-compile`
([1163](https://github.com/jazzband/pip-tools/pull/1163)). Thanks jan25
- Add `pip>=20.2` support
([1168](https://github.com/jazzband/pip-tools/pull/1168)). Thanks atugushev
- `pip-sync` now exists with code `1` on `--dry-run`
([1172](https://github.com/jazzband/pip-tools/pull/1172)). Thanks francisbrito
- `pip-compile` now doesn't resolve constraints from `-c constraints.txt`that are not
(yet) requirements
([1175](https://github.com/jazzband/pip-tools/pull/1175)). Thanks clslgrnc
- Add `--reuse-hashes/--no-reuse-hashes` options to `pip-compile`
([1177](https://github.com/jazzband/pip-tools/pull/1177)). Thanks graingert

5.2.1

Bug Fixes:
- Fix a bug where `pip-compile` would lose some dependencies on update
a `requirements.txt`
([1159](https://github.com/jazzband/pip-tools/pull/1159)). Thanks richafrank

5.2.0

Features:
- Show basename of URLs when `pip-compile` generates hashes in a verbose mode 
([1113](https://github.com/jazzband/pip-tools/pull/1113)). Thanks atugushev
- Add `--emit-index-url/--no-emit-index-url` options to `pip-compile`
([1130](https://github.com/jazzband/pip-tools/pull/1130)). Thanks atugushev

Bug Fixes:
- Fix a bug where `pip-compile` would ignore some of package versions when
`PIP_PREFER_BINARY` is set on
([1119](https://github.com/jazzband/pip-tools/pull/1119)). Thanks atugushev
- Fix leaked URLs with credentials in the debug output of `pip-compile`.
([1146](https://github.com/jazzband/pip-tools/pull/1146)). Thanks atugushev
- Fix a bug where URL requirements would have name collisions
([1149](https://github.com/jazzband/pip-tools/pull/1149)). Thanks geokala

Deprecations:
- Deprecate `--index/--no-index` in favor of `--emit-index-url/--no-emit-index-url`
options in `pip-compile`
([1130](https://github.com/jazzband/pip-tools/pull/1130)). Thanks atugushev

Other Changes:

- Switch to `setuptools` declarative syntax through `setup.cfg`
([1141](https://github.com/jazzband/pip-tools/pull/1141)). Thanks jdufresne

5.1.2

Bug Fixes:
- Fix grouping of editables and non-editables requirements
([1132](https://github.com/jazzband/pip-tools/pull/1132)). Thanks richafrank

5.1.1

Bug Fixes:
- Fix a bug where `pip-compile` would generate hashes for `*.egg` files
([1122](https://github.com/jazzband/pip-tools/pull/1122)). Thanks atugushev

5.1.0

Features:
- Show progress bar when downloading packages in `pip-compile` verbose mode
([949](https://github.com/jazzband/pip-tools/pull/949)). Thanks atugushev
- `pip-compile` now gets hashes from `PyPI` JSON API (if available) which significantly
increases the speed of hashes generation
([1109](https://github.com/jazzband/pip-tools/pull/1109)). Thanks atugushev

5.0.0

Backwards Incompatible Changes:
- `pip-tools` now requires `pip>=20.0` (previosly `8.1.x` - `20.0.x`). Windows users,
make sure to use `python -m pip install pip-tools` to avoid issues with `pip`
self-update from now on
([1055](https://github.com/jazzband/pip-tools/pull/1055)). Thanks atugushev
- `--build-isolation` option now set on by default for `pip-compile`
([1060](https://github.com/jazzband/pip-tools/pull/1060)). Thanks hramezani

Features:
- Exclude requirements with non-matching markers from `pip-sync`
([927](https://github.com/jazzband/pip-tools/pull/927)). Thanks AndydeCleyre
- Add `pre-commit` hook for `pip-compile`
([976](https://github.com/jazzband/pip-tools/pull/976)). Thanks atugushev
- `pip-compile` and `pip-sync` now pass anything provided to the new `--pip-args` option on to `pip`
([1080](https://github.com/jazzband/pip-tools/pull/1080)). Thanks AndydeCleyre
- `pip-compile` output headers are now more accurate when `--` is used to escape filenames
([1080](https://github.com/jazzband/pip-tools/pull/1080)). Thanks AndydeCleyre
- Add `pip>=20.1` support
([1088](https://github.com/jazzband/pip-tools/pull/1088)). Thanks atugushev

Bug Fixes:
- Fix a bug where editables that are both direct requirements and constraints wouldn't appear in `pip-compile` output
([1093](https://github.com/jazzband/pip-tools/pull/1093)). Thanks richafrank
- `pip-compile` now sorts format controls (`--no-binary/--only-binary`) to ensure consistent results
([1098](https://github.com/jazzband/pip-tools/pull/1098)). Thanks richafrank

Improved Documentation:
- Add cross-environment usage documentation to `README`
([651](https://github.com/jazzband/pip-tools/pull/651)). Thanks vphilippon
- Add versions compatibility table to `README`
([1106](https://github.com/jazzband/pip-tools/pull/1106)). Thanks atugushev

4.5.1

Bug Fixes:
- Strip line number annotations such as "(line XX)" from file requirements, to prevent diff noise when modifying input requirement files
([1075](https://github.com/jazzband/pip-tools/pull/1075)). Thanks adamchainz

Improved Documentation:
- Updated `README` example outputs for primary requirement annotations
([1072](https://github.com/jazzband/pip-tools/pull/1072)). Thanks richafrank

4.5.0

Features:
- Primary requirements and VCS dependencies are now get annotated with any source `.in` files and reverse dependencies
([1058](https://github.com/jazzband/pip-tools/pull/1058)). Thanks AndydeCleyre

Bug Fixes:
- Always use normalized path for cache directory as it is required in newer versions of `pip`
([1062](https://github.com/jazzband/pip-tools/pull/1062)). Thanks kammala

Improved Documentation:
- Replace outdated link in the `README` with rationale for pinning
([1053](https://github.com/jazzband/pip-tools/pull/1053)). Thanks m-aciek

4.4.1

Bug Fixes:
- Fix a bug where `pip-compile` would keep outdated options from `requirements.txt`
([1029](https://github.com/jazzband/pip-tools/pull/1029)). Thanks atugushev
- Fix the `No handlers could be found for logger "pip.*"` error by configuring the builtin logging module
([1035](https://github.com/jazzband/pip-tools/pull/1035)). Thanks vphilippon
- Fix a bug where dependencies of relevant constraints may be missing from output file
([1037](https://github.com/jazzband/pip-tools/pull/1037)). Thanks jeevb
- Upgrade the minimal version of `click` from `6.0` to `7.0` version in `setup.py`
([1039](https://github.com/jazzband/pip-tools/pull/1039)). Thanks hramezani
- Ensure that depcache considers the python implementation such that (for example) `cpython3.6` does not poison the results of `pypy3.6`
([1050](https://github.com/jazzband/pip-tools/pull/1050)). Thanks asottile

Improved Documentation:
- Make the `README` more imperative about installing into a project's virtual environment to avoid confusion
([1023](https://github.com/jazzband/pip-tools/pull/1023)). Thanks tekumara
- Add a note to the `README` about how to install requirements on different stages to [Workflow for layered requirements](https://github.com/jazzband/pip-toolsworkflow-for-layered-requirements) section
([1044](https://github.com/jazzband/pip-tools/pull/1044)). Thanks hramezani

4.4.0

Features:
- Add `--cache-dir` option to `pip-compile`
([1022](https://github.com/jazzband/pip-tools/pull/1022)).  Thanks richafrank
- Add `pip>=20.0` support
([1024](https://github.com/jazzband/pip-tools/pull/1024)). Thanks atugushev

Bug Fixes:
- Fix a bug where `pip-compile --upgrade-package` would upgrade those passed packages not already required according to the `*.in` and `*.txt` files
([1031](https://github.com/jazzband/pip-tools/pull/1031)). Thanks AndydeCleyre

4.3.0

Features:
- Add Python 3.8 support
([956](https://github.com/jazzband/pip-tools/pull/956)). Thanks hramezani
- Unpin commented out unsafe packages in `requirements.txt`
([975](https://github.com/jazzband/pip-tools/pull/975)).  Thanks atugushev

Bug Fixes:
- Fix `pip-compile` doesn't copy `--trusted-host` from `requirements.in` to `requirements.txt`
([964](https://github.com/jazzband/pip-tools/pull/964)). Thanks atugushev
- Add compatibility with `pip>=20.0`
([953](https://github.com/jazzband/pip-tools/pull/953) and [978](https://github.com/jazzband/pip-tools/pull/978)). Thanks atugushev
- Fix a bug where the resolver wouldn't clean up the ephemeral wheel cache
([968](https://github.com/jazzband/pip-tools/pull/968)). Thanks atugushev

Improved Documentation:
- Add a note to `README` about `requirements.txt` file, which would possibly interfere if you're compiling from scratch
([959](https://github.com/jazzband/pip-tools/pull/959)). Thanks hramezani

4.2.0

Features:
- Add `--ask` option to `pip-sync`
([913](https://github.com/jazzband/pip-tools/pull/913)). Thanks georgek

Bug Fixes:
- Add compatibility with `pip>=19.3`
([864](https://github.com/jazzband/pip-tools/pull/864), [904](https://github.com/jazzband/pip-tools/pull/904), [910](https://github.com/jazzband/pip-tools/pull/910), [912](https://github.com/jazzband/pip-tools/pull/912) and [915](https://github.com/jazzband/pip-tools/pull/915)). Thanks atugushev
- Ensure `pip-compile --no-header <blank requirements.in>` creates/overwrites `requirements.txt`
([909](https://github.com/jazzband/pip-tools/pull/909)). Thanks AndydeCleyre
- Fix `pip-compile --upgrade-package` removes «via» annotation
([931](https://github.com/jazzband/pip-tools/pull/931)). Thanks hramezani

Improved Documentation:
- Add info to `README` about layered requirements files and `-c` flag
([905](https://github.com/jazzband/pip-tools/pull/905)). Thanks jamescooke

4.1.0

Features:
- Add `--no-emit-find-links` option to `pip-compile`
([873](https://github.com/jazzband/pip-tools/pull/873)). Thanks jacobtolar

Bug Fixes:
- Prevent `--dry-run` log message from being printed with `--quiet` option in `pip-compile`
([861](https://github.com/jazzband/pip-tools/pull/861)). Thanks ddormer
- Fix resolution of requirements from Git URLs without `-e`
([879](https://github.com/jazzband/pip-tools/pull/879)). Thanks andersk

4.0.0

Backwards Incompatible Changes:
- Drop support for EOL Python 3.4
([803](https://github.com/jazzband/pip-tools/pull/803)). Thanks auvipy

Bug Fixes:
- Fix `pip>=19.2` compatibility
([857](https://github.com/jazzband/pip-tools/pull/857)). Thanks atugushev

3.9.0

Features:
- Print provenance information when `pip-compile` fails
([837](https://github.com/jazzband/pip-tools/pull/837)). Thanks jakevdp

Bug Fixes:
- Output all logging to stderr instead of stdout
([834](https://github.com/jazzband/pip-tools/pull/834)). Thanks georgek
- Fix output file update with `--dry-run` option in `pip-compile`
([842](https://github.com/jazzband/pip-tools/pull/842)). Thanks shipmints and atugushev

3.8.0

Features:
- Options `--upgrade` and `--upgrade-package` are no longer mutually exclusive
([831](https://github.com/jazzband/pip-tools/pull/831)). Thanks adamchainz

Bug Fixes:
- Fix `--generate-hashes` with bare VCS URLs
([812](https://github.com/jazzband/pip-tools/pull/812)). Thanks jcushman
- Fix issues with `UnicodeError` when installing `pip-tools` from source in some systems
([816](https://github.com/jazzband/pip-tools/pull/816)). Thanks AbdealiJK
- Respect `--pre` option in the input file
([822](https://github.com/jazzband/pip-tools/pull/822)). Thanks atugushev
- Option `--upgrade-package` now works even if the output file does not exist
([831](https://github.com/jazzband/pip-tools/pull/831)). Thanks adamchainz

3.7.0

Features:
- Show progressbar on generation hashes in `pip-compile` verbose mode
([743](https://github.com/jazzband/pip-tools/pull/743)). Thanks atugushev
- Add options `--cert` and `--client-cert` to `pip-sync`
([798](https://github.com/jazzband/pip-tools/pull/798)). Thanks atugushev
- Add support for `--find-links` in `pip-compile` output
([793](https://github.com/jazzband/pip-tools/pull/793)). Thanks estan and atugushev
- Normalize «command to run» in `pip-compile` headers
([800](https://github.com/jazzband/pip-tools/pull/800)). Thanks atugushev
- Support URLs as packages
([807](https://github.com/jazzband/pip-tools/pull/807)). Thanks jcushman, nim65s and toejough

Bug Fixes:
- Fix replacing password to asterisks in `pip-compile`
([808](https://github.com/jazzband/pip-tools/pull/808)). Thanks atugushev

3.6.1

Bug Fixes:
- Fix `pip>=19.1` compatibility
([795](https://github.com/jazzband/pip-tools/pull/795)). Thanks atugushev

3.6.0

Features:
- Show less output on `pip-sync` with `--quiet` option
([765](https://github.com/jazzband/pip-tools/pull/765)). Thanks atugushev
- Support the flag `--trusted-host` in `pip-sync`
([777](https://github.com/jazzband/pip-tools/pull/777)). Thanks firebirdberlin

3.5.0

Features:
- Show default index url provided by `pip`
([735](https://github.com/jazzband/pip-tools/pull/735)). Thanks atugushev
- Add an option to allow enabling/disabling build isolation
([758](https://github.com/jazzband/pip-tools/pull/758)). Thanks atugushev

Bug Fixes:
- Fix the output file for `pip-compile` with an explicit `setup.py` as source file
([731](https://github.com/jazzband/pip-tools/pull/731)). Thanks atugushev
- Fix order issue with generated lock file when `hashes` and `markers` are used together
([763](https://github.com/jazzband/pip-tools/pull/763)). Thanks milind-shakya-sp

3.4.0

Features:
- Add option `--quiet` to `pip-compile`
([720](https://github.com/jazzband/pip-tools/pull/720)). Thanks bendikro
- Emit the original command to the `pip-compile`'s header
([733](https://github.com/jazzband/pip-tools/pull/733)). Thanks atugushev

Bug Fixes:
- Fix `pip-sync` to use pip script depending on a python version
([737](https://github.com/jazzband/pip-tools/pull/737)). Thanks atugushev

3.3.2

Bug Fixes:
- Fix `pip-sync` with a temporary requirement file on Windows
([723](https://github.com/jazzband/pip-tools/pull/723)). Thanks atugushev
- Fix `pip-sync` to prevent uninstall of stdlib and dev packages
([718](https://github.com/jazzband/pip-tools/pull/718)). Thanks atugushev

3.3.1

Features:
- Added support of `pip` 19.0
([715](https://github.com/jazzband/pip-tools/pull/715)). Thanks atugushev
- Add `--allow-unsafe` to update instructions in the generated `requirements.txt`
([708](https://github.com/jazzband/pip-tools/pull/708)). Thanks richafrank

Bug Fixes:
- Fix `pip-sync` to check hashes
([706](https://github.com/jazzband/pip-tools/pull/706)). Thanks atugushev

3.2.0

Features:
- Apply version constraints specified with package upgrade option (`-P, --upgrade-package`)
([694](https://github.com/jazzband/pip-tools/pull/694)). Thanks richafrank

3.1.0

Features:
- Added support of `pip` 18.1
([689](https://github.com/jazzband/pip-tools/pull/689)). Thanks vphilippon

3.0.0

Major changes:
- Update `pip-tools` for native `pip` 8, 9, 10 and 18 compatibility, un-vendoring `pip` to use the user-installed `pip`
([657](https://github.com/jazzband/pip-tools/pull/657) and [672](https://github.com/jazzband/pip-tools/pull/672)).
Thanks to techalchemy, suutari, tysonclugg and vphilippon for contributing on this.

Features:
- Removed the dependency on the external library `first`
([676](https://github.com/jazzband/pip-tools/pull/676)). Thanks jdufresne

2.0.2

Bug Fixes:
- Added clearer error reporting when skipping pre-releases
([655](https://github.com/jazzband/pip-tools/pull/655)). Thanks WoLpH

2.0.1

Bug Fixes:
- Added missing package data from vendored pip, such as missing cacert.pem file. Thanks vphilippon

2.0.0

Major changes:
- Vendored `pip` 9.0.3 to keep compatibility for users with `pip` 10.0.0
([644](https://github.com/jazzband/pip-tools/pull/644)). Thanks vphilippon

Features:
- Improved the speed of pip-compile --generate-hashes by caching the hashes from an existing output file
([641](https://github.com/jazzband/pip-tools/pull/641)). Thanks justicz
- Added a `pip-sync --user` option to restrict attention to user-local directory
([642](https://github.com/jazzband/pip-tools/pull/642)). Thanks jbergknoff-10e
- Removed the hard dependency on setuptools
([645](https://github.com/jazzband/pip-tools/pull/645)). Thanks vphilippon

Bug fixes:
- The pip environment markers on top-level requirements in the source file (requirements.in)
are now properly handled and will only be processed in the right environment
([647](https://github.com/jazzband/pip-tools/pull/647)). Thanks JoergRittinger

1.11.0

Features:
- Allow editable packages in requirements.in with `pip-compile --generate-hashes` ([524](https://github.com/jazzband/pip-tools/pull/524)). Thanks jdufresne
- Allow for CA bundles with `pip-compile --cert` ([612](https://github.com/jazzband/pip-tools/pull/612)). Thanks khwilson
- Improved `pip-compile` duration with large locally available editable requirement by skipping a copy to the cache
([583](https://github.com/jazzband/pip-tools/pull/583)). Thanks costypetrisor
- Slightly improved the `NoCandidateFound` error message on potential causes ([614](https://github.com/jazzband/pip-tools/pull/614)). Thanks vphilippon

Bug Fixes:
- Add `-markerlib` to the list of `PACKAGES_TO_IGNORE` of `pip-sync` ([613](https://github.com/jazzband/pip-tools/pull/613)).

1.10.2

Bug Fixes:
- Fixed bug causing dependencies from invalid wheels for the current platform to be included ([571](https://github.com/jazzband/pip-tools/pull/571)).
- `pip-sync` will respect environment markers in the requirements.txt ([600](https://github.com/jazzband/pip-tools/pull/600)). Thanks hazmat345
- Converted the ReadMe to have a nice description rendering on PyPI. Thanks bittner

1.10.1

Bug Fixes:
- Fixed bug breaking `pip-sync` on Python 3, raising `TypeError: '<' not supported between instances of 'InstallRequirement' and 'InstallRequirement'` ([570](https://github.com/jazzband/pip-tools/pull/570)).

1.10.0

Features:
- `--generate-hashes` now generates hashes for all wheels,
not only wheels for the currently running platform ([520](https://github.com/jazzband/pip-tools/pull/520)). Thanks jdufresne
- Added a `-q`/`--quiet` argument to the pip-sync command to reduce log output.

Bug Fixes:
- Fixed bug where unsafe packages would get pinned in generated requirements files
when `--allow-unsafe` was not set. ([517](https://github.com/jazzband/pip-tools/pull/517)). Thanks dschaller
- Fixed bug where editable PyPI dependencies would have a `download_dir` and be exposed to `git-checkout-index`,
(thus losing their VCS directory) and `python setup.py egg_info` fails. ([385](https://github.com/jazzband/pip-tools/pull/385) and [538](https://github.com/jazzband/pip-tools/pull/538)). Thanks blueyed and dfee
- Fixed bug where some primary dependencies were annotated with "via" info comments. ([542](https://github.com/jazzband/pip-tools/pull/542)). Thanks quantus
- Fixed bug where pkg-resources would be removed by pip-sync in Ubuntu. ([555](https://github.com/jazzband/pip-tools/pull/555)). Thanks cemsbr
- Fixed bug where the resolver would sometime not stabilize on requirements specifying extras. ([566](https://github.com/jazzband/pip-tools/pull/566)). Thanks vphilippon
- Fixed an unicode encoding error when distribution package contains non-ASCII file names ([567](https://github.com/jazzband/pip-tools/pull/567)). Thanks suutari
- Fixed package hashing doing unnecessary unpacking ([557](https://github.com/jazzband/pip-tools/pull/557)). Thanks suutari-ai

Links

• PyPI: https://pypi.org/project/pip-tools
• Changelog: https://pyup.io/changelogs/pip-tools/
• Repo: https://github.com/jazzband/pip-tools/