Update antimicrox to 3.1.2

Summary:
Release notes available here.

Development has move on to a new repository, the other one is now archived.

Test Plan: Tested with my usual mouse mulation profile, everything is nominal.

Reviewers: Triage Team, JoshStrobl

Reviewed By: Triage Team, JoshStrobl

Subscribers: JoshStrobl

Differential Revision: https://dev.getsol.us/D9778