chore: publish inline type annotations

[jamesdow21]

Description

Adding a blank "py.typed" marker file will allow mypy to recognize that type annotations are provided inline.

Motivation and Context

Currently, mypy is not able to analyze any usage of this library and gives the following error

error: Skipping analyzing "redshift_connector": module is installed, but missing library stubs or py.typed marker  [import-untyped]

Fixes #223

Testing

Ran build.sh and verified that the py.typed file ends up in the sdist and wheel

No code has been changed, so I didn't add any unit tests There were 3 unit tests that failed for me locally; however, that was also the case on master before making any changes.

Screenshots (if appropriate)

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)

Checklist

• [x] Local run of ./build.sh succeeds
• [x] Code changes have been run against the repository's pre-commit hooks
• [x] Commit messages follow Conventional Commit Specification
• [x] I have read the README document
• [ ] I have added tests to cover my changes
• [ ] I have run all unit tests using pytest test/unit and they are passing.
  • By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[Brooke-white]

Hi @jamesdow21 , thank you for taking the time to open this PR and for your patience. I am going to pull your changes in locally and perform some testing on my end. Once that completes, barring any issue, I anticipate we can get this PR merged.