v2.9.0

Features

• add context manager support in client (#516) (51eae67)
• add support for Python 3.10 (#518) (bb25d75)

Bug Fixes

• add 'dict' annotation type to 'request' (b72522a)
• deps: drop packaging dependency (290b9c5)
• deps: require google-api-core >= 1.28.0 (290b9c5)
• improper types in pagers generation (2ad639d)

Documentation

• add type annotations to codebase (#509) (093cabf)
• list oneofs in docstring (290b9c5)