Log Message:
py-ZopeComponent: updated to 4.5

4.5:
- Add support for Python 3.7.
- Always install zope.hookable as a dependency (the hook
  extra is now empty). zope.hookable respects the PURE_PYTHON
  environment variable, and has an optional C extension.
- Make accessing names that have been moved to zope.interface
  produce a DeprecationWarning.