Bump version to 2.2.0

Author: silvanocerza

setup.py

@@ -10,7 +10,7 @@
 
 setup(
     name="ipinfo_django",
-    version="2.1.0",
+    version="2.2.0",
     description="Official Django library for IPinfo",
     long_description=long_description,
     url="https://github.com/ipinfo/django",