Merge pull request #43 from NVIDIA/dependabot/pip/protobuf-3.15.0

Bump protobuf from 3.11.3 to 3.15.0

Author: roclark

requirements.txt

@@ -26,7 +26,7 @@ opt-einsum==3.3.0
 packaging==20.4
 Pillow==9.0.0
 pluggy==0.13.1
-protobuf==3.11.3
+protobuf==3.15.0
 py==1.10.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8