bump version to 0.3.1

Author: timvink

setup.py

@@ -5,7 +5,7 @@
 
 setup(
     name='mkdocs-git-revision-date-localized-plugin',
-    version='0.2.1',
+    version='0.3.1',
     description='Mkdocs plugin that enables displaying the localized date of the last git modification of a markdown file.',
     long_description=long_description,
     long_description_content_type="text/markdown",