Bump mypy from 0.990 to 0.991 (#264)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements_test.txt

@@ -1,5 +1,5 @@
 -r requirements_test_pre_commit.txt
-mypy==0.990
+mypy==0.991
 pre-commit==2.20.0
 pylint==2.15.5
 pytest==7.2.0