Fix version in documentation

Author: jcapriot

docs/conf.py

@@ -64,10 +64,10 @@
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
-# The short X.Y version.
-version = u'0.2.0'
 # The full version, including alpha/beta/rc tags.
-release = u'0.2.0'
+release = pymatsolver.__version__
+# The short X.Y version.
+version = ".".join(release.split(".")[:2])
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.