chore(deps): update dependency google-cloud-storage to v2.1.0 (#200)

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

* add pin for google-cloud-storage for py3.6

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

Author: renovate-bot

compute/compute/snippets/requirements-test.txt

@@ -1,3 +1,4 @@
 pytest==6.2.5
 flaky==3.7.0
-google-cloud-storage==2.0.0
+google-cloud-storage==2.0.0; python_version == '3.6'
+google-cloud-storage==2.1.0; python_version >= '3.7'