Update dependency grpcio to v1.28.1 (#358)

renovate-bot · web-flow · commit 922b081a98ec · 2020-04-03T14:40:01.000-07:00
diff --git a/requirements.txt b/requirements.txt
@@ -1,7 +1,7 @@
 click==7.1.1
 google-api-core==1.16.0
 googleapis-common-protos==1.51.0
-grpcio==1.27.2
+grpcio==1.28.1
 jinja2==2.11.1
 protobuf==3.11.3
 pypandoc==1.4
