chore(deps): update dependency grafeas to v1.1.2 (#166)

Author: renovate-bot

container_registry/container_analysis/snippets/requirements.txt

@@ -1,6 +1,6 @@
 google-cloud-pubsub==2.6.1
 google-cloud-containeranalysis==2.4.1
-grafeas==1.1.1
+grafeas==1.1.2
 pytest==5.3.0; python_version > "3.0"
 pytest==4.6.6; python_version < "3.0"
 flaky==3.7.0