Bump the python-dependencies group with 2 updates

Bumps the python-dependencies group with 2 updates: [arrow](https://github.com/arrow-py/arrow) and [stack-data](https://github.com/alexmojaki/stack_data).


Updates `arrow` from 1.2.3 to 1.3.0
- [Release notes](https://github.com/arrow-py/arrow/releases)
- [Changelog](https://github.com/arrow-py/arrow/blob/master/CHANGELOG.rst)
- [Commits](arrow-py/arrow@1.2.3...1.3.0)

Updates `stack-data` from 0.6.2 to 0.6.3
- [Commits](alexmojaki/stack_data@v0.6.2...v0.6.3)

---
updated-dependencies:
- dependency-name: arrow
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: python-dependencies
- dependency-name: stack-data
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: python-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>