Ffmpeg-normalize

* Bump ffmpeg-progress-yield, round percentage output.

* Fix test for progress.

seems flaky, worked locally?

* Bump ffmpeg-progress-yield, output progress in percent.

* Docs: add 07416 as a contributor.

* A typo in README (231)

* Fix capping to [1, 50] instead of [1, 7] (230)

* Clarify usage, output/input order.

* Add note on ffmpeg 6.0.

* Docs: add mjhalwa as a contributor.

* 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.