Update version number

Author: markstory

setup.py

@@ -29,7 +29,7 @@
 
 setup(
     name="sphinxcontrib-phpdomain",
-    version="0.13.0",
+    version="0.13.1",
     url="https://github.com/markstory/sphinxcontrib-phpdomain",
     download_url="http://pypi.python.org/pypi/sphinxcontrib-phpdomain",
     license="BSD",