Features
- Optimizing sending answers to questions
([1227](https://github.com/python-zeroconf/python-zeroconf/pull/1227),
[`cd7b56b`](https://github.com/python-zeroconf/python-zeroconf/commit/cd7b56b2aa0c8ee429da430e9a36abd515512011))
- Speed up the service registry with a cython pxd
([1226](https://github.com/python-zeroconf/python-zeroconf/pull/1226),
[`47d3c7a`](https://github.com/python-zeroconf/python-zeroconf/commit/47d3c7ad4bc5f2247631c3ad5e6b6156d45a0a4e))