0.15.0 release

This release drops support for Python 2.7 and Python 3.5 (both are EOL).
Other than a few minor fixes, there are no functional differences from the
0.14.0 release.

Other call-outs:
- Mac users: Gitlint can now be installed using both homebrew
  (upgraded to latest) and macports.
- Bugfix: Gitlint now properly handles exceptions when using its built-in
  commit-msg hook (#166)
- All dependencies have been upgraded to the latest available versions
  (Click==7.1.2, arrow==0.17.0, sh==1.14.1)
- Much under-the-hood refactoring as a result of dropping Python 2.7

Full Release details in CHANGELOG.md.

Author: jorisroovers

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog #
 
-## v0.15.0 (TBD) ##
+## v0.15.0 (2020-11-27) ##
 
 Contributors:
 Special thanks to [BrunIF](https://github.com/BrunIF), [lukech](https://github.com/lukech), [Cielquan](https://github.com/Cielquan), [harens](https://github.com/harens) and [sigmavirus24](https://github.com/sigmavirus24).

gitlint/__init__.py

@@ -1 +1 @@
-__version__ = "0.15.0dev"
+__version__ = "0.15.0"