[Feature] Provide official & up to date builds

[o-l-a-v]

Provide official & up to date builds on release, to make it easy for people and package managers like Scoop ( https://github.com/ScoopInstaller/Main/blob/master/bucket/opus-tools.json ) and Chocolatey ( https://community.chocolatey.org/packages/opus-tools ) to stay up to date.

Mozilla builds are from 2018:

• https://ftp.mozilla.org/pub/opus/win32/
• https://ftp.mozilla.org/pub/opus/win64/

FLAC releases Windows builds with each GitHub release, great:

• https://github.com/xiph/flac/releases/tag/1.5.0

Other unofficial Opus builds (if people are looking):

• https://www.rarewares.org/opus.php
• https://github.com/Chocobo1/opus-tools_win32-build/releases
• https://www.videohelp.com/software/OpusTools
• https://hydrogenaud.io/index.php/topic,125801.0.html
• https://www.foobar2000.org/encoderpack