Bump up Go version to 1.19
What's Changed
- Fix gRPC warnings by @devlights in #1
- Remove Makefile by @devlights in #2
- Bump up Go version to 1.19 by @devlights in #3
- Update README by @devlights in #4
Full Changelog: v1.0.2...v1.0.3
Full Changelog: v1.0.2...v1.0.3