Ship type hints for other packages to use [skip ci]

Author: adamtheturtle

dev-requirements.txt

@@ -25,5 +25,5 @@ sphinxcontrib-spelling==4.2.0
 twine==1.12.1
 versioneer==0.18
 vulture==1.0
-VWS-Python-Mock==2018.11.25.0
+VWS-Python-Mock==2018.12.1.0
 yapf==0.25.0  # Automatic formatting for Python