Ffmpeg-normalize

* Add "-hide_banner" remove "-nostdin" (222)

The `-nostdin` option is unnessary because of the `-y` option.
Adding `-hide_banner` makes DEBUG statements shorter.

* Homebrew works on linux too.

* Explain ffmpeg installation steps.

* Re-add requirements.txt to (maybe) fix conda-forge builds.

* Fix requirements (218)

* Improve types.

* Docs: add g3n35i5 as a contributor.

* Add ignore-revs file.

* Formatting and import sorting.

* Refactor: Improved logging behavior (216)

* Add "apt update" (215)

* Remove stalebot.

* Update README.

* Move to_ms and make CommandRunner more ergonomic (212)

* Upgrade workflow, get ffmpeg from apt (213)

* Turn FFmpegNormalizeError into a normal Exception (211)

* Remove manifest.in (210)

* Simplify logging (209)

* Use pep585 type hints (207)

* Don't use tempfile's private module function (206)

* Fix smaller type errors.

* Reduce mypy errors 12 -> 4 (204)

* Make input validation more efficient.

Make input validation more efficient

Re-separate formats and exts

* Bump requirements.

* Add py.typed support.

* General refactoring + type hints (202)

* Re-write to f-strings when possible (201)

* Remove unnecessary utf-8 declarations (200)

"-*- coding: utf-8 -*-" is a Python 2 construct and can be safely
removed. Other utf-8 declarations are also unnecessary.

* Add .editorconfig.

* Link to API docs.

* Add docs.

* Add type hints, document everything, refactor some code.

* Add more audio formats (199)

* Add python 3.11 to CI.

* Docs: add WyattBlue as a contributor for code (198)

* docs: update README.md

* docs: update .all-contributorsrc

* Upgrade to Python 3.8 syntax (197)

* Fix python version in github tests.

* Bump requirements to latest versions.

* Add python 3.11 to list of languages.

* Bump required python version to 3.8.

* Various minor code cleanups and type hints.

* Harmonize logger code.

* Update python version in tests.

* Docs: add mvbattista as a contributor.

* Docs: add mpuels as a contributor.

* Docs: add Mathijsz as a contributor.

* Docs: add Nottt as a contributor.

* Docs: add justinpearson as a contributor.

* Docs: add kostalski as a contributor.

* Docs: add jetpks as a contributor.

* Docs: add aviolo as a contributor.

* Docs: add thenewguy as a contributor.

* Docs: add Geekfish as a contributor.

* Docs: add benjaoming as a contributor.

* Reference speechnorm.