v0.14

* Allow `None` to be used as key in pure-Python implementation.
  By @TIGirardi.

Author: 1st1

immutables/_version.py

@@ -10,4 +10,4 @@
 # supported platforms, publish the packages on PyPI, merge the PR
 # to the target branch, create a Git tag pointing to the commit.
 
-__version__ = '0.13'
+__version__ = '0.14'