Set version to 0.3.1.

Author: scoder

setup.py

@@ -18,7 +18,7 @@
 
 setup(
     name="lxml-stubs",
-    version="0.3.0",
+    version="0.3.1",
     description="Type annotations for the lxml package",
     long_description=long_description,
     long_description_content_type="text/markdown",