Ffmpeg-normalize

* Constrain input LRA for second pass, addresses 227.

* Feat: add linear loudnorm option to set lra up to target, then keep input lra.

* Update question template.

* Production status stable.

* Make install_requires more abstract.

* 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