v0.1.0

Added

• Tests & Github Actions CI

Changed

• Support os.PathLike in dump_open & dump_open_append.
• Support os.PathLike in open_offline.
• inject and sendpacket now take an object implementing the buffer protocol.
• Switch to using cythonize in setup.py (The built-in setuptools integration uses the
  deprecated old_build_ext and keyed off whether to generate C sources on whether Cython is
  installed).

Fixed

• NETMASK_UNKNOWN was of the wrong type.