Log Message:
py-async_generator: updated to 1.10

Async_Generator 1.10:

Features
- Add support for PEP 525-style finalization hooks via
  set_asyncgen_hooks() and get_asyncgen_hooks() functions. On
  Python 3.6+, these are aliases for the versions in sys; on
  Python 3.5, they're work-alike implementations. And,
  @async_generator generators now call these hooks at the
  appropriate times.

Fixes
- Package now properly includes license files.