chore(deps): update dependency google-cloud-storage to v2.1.0 (#264)

* chore(deps): update dependency google-cloud-storage to v2.1.0

* pin google-cloud-storage for python 3.6

* revert pin for py36

Co-authored-by: Anthonios Partheniou <[email protected]>

Author: renovate-bot

document_ai/snippets/requirements.txt

@@ -1,2 +1,2 @@
 google-cloud-documentai==1.2.1
-google-cloud-storage==2.0.0
+google-cloud-storage==2.1.0