Pyjson5

* Fallback to encode `vars(obj)` if `obj` is not stringifyable, e.g. to serialize [dataclasses](https://docs.python.org/3/library/dataclasses.html).
* Update documentation to use newer [sphinx](https://www.sphinx-doc.org/) version.
* Use [dependabot](https://github.com/dependabot) to keep dependencies current.
* Update [fast_double_parser](https://github.com/lemire/fast_double_parser).

**Full Changelog**: https://github.com/Kijewski/pyjson5/compare/v1.5.3...v1.6.0

What's Changed
* Create codeql-analysis.yml by Kijewski in https://github.com/Kijewski/pyjson5/pull/16
* Add type hints, according to PEP 484 by pcorpet in https://github.com/Kijewski/pyjson5/pull/18

New Contributors
* pcorpet made their first contribution in https://github.com/Kijewski/pyjson5/pull/18

**Full Changelog**: https://github.com/Kijewski/pyjson5/compare/v1.5.2...v1.5.3

What's Changed
* Use filenames with extensions by Kijewski in https://github.com/Kijewski/pyjson5/pull/15


**Full Changelog**: https://github.com/Kijewski/pyjson5/compare/v1.5.1...v1.5.2

**Full Changelog**: https://github.com/Kijewski/pyjson5/compare/v1.5.0...v1.5.1

What's Changed
* Faster double encoding by Kijewski in https://github.com/Kijewski/pyjson5/pull/12


**Full Changelog**: https://github.com/Kijewski/pyjson5/compare/v1.4.9...v1.5.0