chore: Bump version to 0.19

Author: abawchen

setup.py

@@ -2,7 +2,7 @@
 
 setup(
     name='graphene-mongo',
-    version='0.1.18',
+    version='0.1.19',
 
     description='Graphene Mongoengine integration',
     long_description=open('README.rst').read(),