chore(deps): update dependency mypy to v1.20.1 (#57)

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

Author: renovate[bot]

requirements.dev.txt

@@ -2,7 +2,7 @@
 -r requirements.txt
 
 coverage==7.13.5
-mypy==1.19.1
+mypy==1.20.1
 pytest==9.0.3
 pytest-cov==7.1.0
 pytest-xdist==3.8.0