v1.2.1 obs-placeholder for OBS v.28 on M1 and Intel Macs

OBS v.28 is a major redesign off OBS Studio, and as a result, this plugin would not load in v.28 on MacOS.

This release should work with OBS Studio v.28 on M1 and Intel Macs.

This relase has only been tested with OBS v28.0.3 on an M1 mac running MacOS 12.6.