Bump version to 0.511 (python#3344)

Bump version to 0.510

Bump version to 0.501

There was a problem with uploading packages for 0.500 and PyPI doesn't
like uploading multiple different packages for a single version, so
bumping version. There are no functional changes from 0.500.

Fix test failure caused by version being 0.500 (python#2936)

Fix replace() that used the mypy version as the thing to replace,
which happened to match the string '0.5000' in the output of a test
case.

Release version 0.471

Bump version to 0.470

Bump version to 0.4.6

Add 0.4.5 release notes to documentation

Bump version to 0.4.4

Bump version to 0.4.3