Update dependency mypy to v1.20.0 (#190)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

requirements-test.txt

@@ -8,7 +8,7 @@ aioresponses==0.7.8
 aiofiles==25.1.0
 radon==6.0.1
 types-aiofiles==25.1.0.20251011
-mypy==1.19.1
+mypy==1.20.0
 pylint==4.0.5
 aiofiles==25.1.0
 pydantic==2.12.5