Update mypy from <1.18 to <1.21 (support through 1.20.1) - #2373

Update mypy from <1.18 to <1.21 (support through 1.20.1)#2373

sobolevn merged 3 commits into

masterdry-python/returns:masterfrom

copilot/update-mypy-to-latest-versiondry-python/returns:copilot/update-mypy-to-latest-versionCopy head branch name to clipboard