chore(deps): update dependency google-auth to v2.1.0 (#120)

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

Author: renovate-bot

privateca/snippets/requirements-test.txt

@@ -1,3 +1,3 @@
 pytest==6.2.5
-google-auth==2.0.2
+google-auth==2.1.0
 cryptography==3.4.8