Log Message:
py-mypy: updated to 0.711

0.711:
The following two issues in mypy 0.710 were fixed:
Revert typeshed (“Define functools.partial as overloaded function instead of \ 
its own class”). This caused too many false positive errors in real-world \ 
code.
Fix MYPYC_BLACKLIST on Windows. This broke running dmypy on Windows.