Add versions to mypy hook's additional dependencies

[mcous]

I was recently introduced to Ward, and I really like the look and feel of it! I like to write my tests with mypy's strict mode, so I wanted to see if I could help with things like #261.

In the meantime, my freshly cloned copy of this repository would not pass mypy checking. Upon investigation, the project depends on rich@^10.0.0, but the pre-commit mypy hook was pulling down latest due to a lack of a version spec. Since rich had breaking changes between 10 and its current of 12, type checking errors were triggered.

This little PR copies the version specs for non-stub typed dependencies from those specified in pyproject.toml over to the additional_dependencies section in .pre-commit-config.yaml, which should fix the issue and prevent it from happening again in the future.

[codecov]

Codecov Report

Merging #321 (d42e0c3) into master (207757e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #321   +/-   ##
=======================================
  Coverage   84.54%   84.54%           
=======================================
  Files          21       21           
  Lines        1851     1851           
  Branches      284      284           
=======================================
  Hits         1565     1565           
  Misses        242      242           
  Partials       44       44           

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[darrenburns]

Thanks @mcous!