Add a series of new pre-commit hooks and GitHub Actions

[bachya]

Describe what the PR does:

This PR adds a series of new pre-commit hooks and GitHub Actions, all of which will help the library stay fresh as time goes on.

Does this fix a specific issue?

N/A

Checklist:

• Confirm that one or more new tests are written for the new functionality.
• Run tests and ensure everything passes (with 100% test coverage).
• Update README.md with any new documentation.
• Add yourself to AUTHORS.md.

[codecov]

Codecov Report

Merging #116 (62dab12) into dev (5afb7d2) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               dev      #116   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            4         4           
  Lines          167       167           
=========================================
  Hits           167       167           

Impacted Files	Coverage Δ
pytile/tile.py	100.00% <ø> (ø)
pytile/api.py	100.00% <100.00%> (ø)

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[codeclimate]

Code Climate has analyzed commit 62dab12 and detected 0 issues on this pull request.

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