Strictly-typed-pandas

What's Changed
* automerge depandabot PRs by nanne-aben in https://github.com/nanne-aben/strictly_typed_pandas/pull/30
* autoapprove depandabot PRs by nanne-aben in https://github.com/nanne-aben/strictly_typed_pandas/pull/31
* Bump mypy from 1.2.0 to 1.3.0 by dependabot in https://github.com/nanne-aben/strictly_typed_pandas/pull/32
* Bump sphinx-rtd-theme from 1.2.0 to 1.2.1 by dependabot in https://github.com/nanne-aben/strictly_typed_pandas/pull/37
* Bump coverage from 7.2.5 to 7.2.6 by dependabot in https://github.com/nanne-aben/strictly_typed_pandas/pull/38
* Bump nbsphinx from 0.9.1 to 0.9.2 by dependabot in https://github.com/nanne-aben/strictly_typed_pandas/pull/39
* Update pandas requirement from <=2.0.1 to <=2.0.2 by dependabot in https://github.com/nanne-aben/strictly_typed_pandas/pull/40


**Full Changelog**: https://github.com/nanne-aben/strictly_typed_pandas/compare/V0.1.8...v0.1.9

Bump dependency versions

Also drops Python 3.7 support.

* Stopping support for Python 3.6
* Limiting typeguard version to <3.0.0 for now, because the new version of typeguard is not backward compatible
* Updating the unit tests such that they work with the latest version of pandas and numpy

Resolve the issue where mypy doesn't work when strictly_typed_pandas is installed through PyPi pt. 2