deps: Bump typed-ast 1.4.1→1.4.3 and pytest 6.1.2→6.2.5

These two bumps are required for pytest to work with Python 3.10.
This doesn't matter for builds, or for in CI, but this does matter for
developers whose system Python is up-to-date.

Since Emissary 1.14 is in maintenance mode, I did the smallest
upgrades possible to get things working.

For typed-ast, that means including
python/typed_ast#158, which was first included
in 1.4.3.

For pytest, that means 6.2.5, since that's when the changelog mentions
"Python 3.10 is now supported."
https://docs.pytest.org/en/stable/changelog.html#pytest-6-2-5-2021-08-29

Signed-off-by: Luke Shumaker <lukeshu@datawire.io>

OPENSOURCE.md

@@ -257,7 +257,7 @@ libraries:
     pyasn1-modules        0.2.8      2-clause BSD license
     pyparsing             2.4.7      MIT license
     pyrsistent            0.17.3     MIT license
-    pytest                6.1.2      MIT license
+    pytest                6.2.5      MIT license
     pytest-cov            2.10.1     MIT license
     pytest-rerunfailures  9.1.1      Mozilla Public License 2.0
     python-dateutil       2.8.1      3-clause BSD license, Apache License 2.0
@@ -273,7 +273,7 @@ libraries:
     six                   1.15.0     MIT license
     smmap                 3.0.4      3-clause BSD license
     toml                  0.10.2     MIT license
-    typed-ast             1.4.1      Apache License 2.0
+    typed-ast             1.4.3      Apache License 2.0
     typing-extensions     3.7.4.3    Python Software Foundation license
     urllib3               1.26.3     MIT license
     webencodings          0.5.1      3-clause BSD license

builder/requirements.txt

@@ -49,7 +49,7 @@ pyparsing==2.4.7          # via packaging
 pyrsistent==0.17.3        # via jsonschema
 pytest-cov==2.10.1        # via -r requirements.in
 pytest-rerunfailures==9.1.1  # via -r requirements.in
-pytest==6.1.2             # via -r requirements.in, pytest-cov, pytest-rerunfailures
+pytest==6.2.5             # via -r requirements.in, pytest-cov, pytest-rerunfailures
 python-dateutil==2.8.1    # via kubernetes
 python-json-logger==2.0.1  # via -r requirements.in
 pyyaml==5.4.1             # via -r requirements.in, kubernetes
@@ -62,7 +62,7 @@ sigtools==2.0.2           # via clize
 six==1.15.0               # via clize, google-auth, jsonschema, kubernetes, packaging, protobuf, python-dateutil, sigtools, websocket-client
 smmap==3.0.4              # via gitdb
 toml==0.10.2              # via pytest
-typed-ast==1.4.1          # via mypy
+typed-ast==1.4.3          # via mypy
 typing-extensions==3.7.4.3  # via mypy
 urllib3==1.26.3           # via kubernetes, requests
 websocket-client==0.57.0  # via kubernetes