pip: bump antlr4-python3-runtime from 4.7.1 to 4.12.0

Bumps [antlr4-python3-runtime](http://www.antlr.org) from 4.7.1 to 4.12.0.

---
updated-dependencies:
- dependency-name: antlr4-python3-runtime
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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