Increase to 0.4 version (#268)

Author: seanpmorgan

tensorflow_addons/version.py

@@ -19,7 +19,7 @@
 
 # We follow Semantic Versioning (https://semver.org/)
 _MAJOR_VERSION = '0'
-_MINOR_VERSION = '3'
+_MINOR_VERSION = '4'
 _PATCH_VERSION = '0'
 
 # When building releases, we can update this value on the release branch to