Release 0.5.0 [ci skip] (#433)

* Bump version to 0.5.0 [ci skip]

* Update 0.5.0 release date [ci skip]

Author: utensil

doc/changelog.rst

@@ -2,7 +2,7 @@
 Changelog
 =========
 
-- :release:`0.5.0 <2020.05.27>`
+- :release:`0.5.0 <2020.06.05>`
 
 - :bug:`431` Left and right contraction are no longer swapped on scalar :class:`~sympy.core.expr.Expr` instances.
 - :feature:`232` Python 3.8 is now supported and tested.

galgebra/_version.py

@@ -5,4 +5,4 @@
 # 1) we don't load dependencies by storing it in __init__.py
 # 2) we can import it in setup.py for the same reason
 # 3) we can import it into your module
-__version__ = '0.5.0rc1'
+__version__ = '0.5.0'