chore(deps): update dependency google-cloud-storage to v2 (#247)

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

Author: 3 people

document_ai/snippets/requirements.txt

@@ -1,2 +1,2 @@
 google-cloud-documentai==1.2.0
-google-cloud-storage==1.42.3
+google-cloud-storage==2.0.0