v4.10.1

• Fix Validator.evolve (and APIs like iter_errors which call it) for cases
  where the validator class has been subclassed. Doing so wasn't intended to be
  public API, but given it didn't warn or raise an error it's of course
  understandable. The next release however will make it warn (and a future one
  will make it error). If you need help migrating usage of inheriting from a
  validator class feel free to open a discussion and I'll try to give some
  guidance (#982).

Full Changelog: v4.10.0...v4.10.1