Update ipdb to 0.12.3

[pyup-bot]

This PR updates ipdb from 0.10.3 to 0.12.3.

Changelog

0.12.3

-------------------

- Fix version in usage
[gotcha]

0.12.2

-------------------

- Avoid emitting term-title bytes
[steinnes]

0.12.1

-------------------

- Fix --help 
[native-api]

0.12

-----------------

- Drop support for Python 3.3.x
[bmw]
- Stop deprecation warnings from being raised when IPython >= 5.1 is used.
Support for IPython < 5.1 has been dropped.
[bmw]

0.11

-----------------

- Simplify loading IPython and getting information from it.
Drop support for python 2.6
Drop support for IPython < 5.0.0
[takluyver]

Links

• PyPI: https://pypi.org/project/ipdb
• Changelog: https://pyup.io/changelogs/ipdb/
• Repo: https://github.com/gotcha/ipdb

[coveralls]

Coverage remained the same at 30.441% when pulling 7495941 on pyup-update-ipdb-0.10.3-to-0.12.3 into e67070d on master.