8.1-2

What's Changed

• libpng 1.6.58 by @WyattBlue in #224
• Remove libogg and libvorbis by @WyattBlue in #225
• Use x265 4.2 by @WyattBlue in #226
• Make builds reproducible by @WyattBlue in #228 #229 and #230
• Removed libopen264 because it's not improving, basically not maintained

Full Changelog: 8.1-1...8.1-2