Dnserver

* Added a SRV record in example_zones.toml by azmeuk in https://github.com/samuelcolvin/dnserver/pull/13
* Almost-dynamic zone update by azmeuk in https://github.com/samuelcolvin/dnserver/pull/15
* Dnsserver can be initialized without any zone by azmeuk in https://github.com/samuelcolvin/dnserver/pull/16

**Full Changelog**: https://github.com/samuelcolvin/dnserver/compare/v0.3.0...v0.4.0

* Added python instructions in the README by azmeuk in https://github.com/samuelcolvin/dnserver/pull/10
* Allow DNSServer to not have proxy servers by azmeuk in https://github.com/samuelcolvin/dnserver/pull/9
* correct `pyproject.toml` ef85e97e5b80b0f031fa4f1bedf90440339eb800
* add `setup.py` to view dependants/dependencies in GitHub 77bae98b5ed9b3bbdf6c9b84b249b51df7854d38


**Full Changelog**: https://github.com/samuelcolvin/dnserver/compare/v0.2.1...v0.3.0

No change release to fix docker upload.

First proper release :tada:.