Universal build for arm64/Apple Silicon

[gnattu]

System Information:

macOS version: macOS 11.0.1
Userscripts version: 2.2.0
Safari version: 14.0.1

Userscript currently only has x86 binaries, but the code compiles on arm.

[quoid]

Will try to push a new build for ARM tomorrow

[quoid]

built and pushed, submitted to app store on 2020-06-12