Update dependency mypy to ^0.991

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mypy (source, changelog)	^0.990 -> ^0.991

---

Release Notes

python/mypy

v0.991

Compare Source

---

Configuration

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

🚦 Automerge: Enabled.

♻ 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.

---

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

---

This PR has been generated by Mend Renovate. View repository job log here.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (develop@cfb3efc). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #579   +/-   ##
==========================================
  Coverage           ?   59.27%           
==========================================
  Files              ?       82           
  Lines              ?    11496           
  Branches           ?     1854           
==========================================
  Hits               ?     6814           
  Misses             ?     3149           
  Partials           ?     1533           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.