chore(deps): update dependency mypy to v1.4.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mypy (source, changelog)	==1.3.0 -> ==1.4.0

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Release Notes

python/mypy

### [`v1.4.0`](https://togithub.com/python/mypy/compare/v1.3.0...v1.4.0) [Compare Source](https://togithub.com/python/mypy/compare/v1.3.0...v1.4.0)

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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[codecov[bot]]

Codecov Report

Merging #125 (c740586) into master (c430abb) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #125   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            8         8           
  Lines          377       377           
  Branches        72        72           
=========================================
  Hits           377       377           

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