Bump protobuf from 3.11.0 to 3.18.3

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 3.11.0 to 3.18.3.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/generate_changelog.py)
- [Commits](protocolbuffers/protobuf@v3.11.0...v3.18.3)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -22,7 +22,7 @@ oauthlib==3.1.0
 opencv-python==4.1.2.30
 opt-einsum==3.1.0
 pandas==0.25.3
-protobuf==3.11.0
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 pyparsing==2.4.5