Test for Mixin fixes

Updated to FG3 and made some changes to the build process. Hope this will address the mixin issues for 1.12.2.

3.6.2.2BETA

Release

3.6.2.1BETA: Merge branch '1.12.2' of https://github.com/OreCruncher/DynamicSurrou…

…ndings into 1.12.2

DynamicSurroundings-1.12.2-3.6.2.0

Merge branch 'master' into 1.12.2

1.11.2-3.4.9.8 Checkpoint

Checkpoint for potential RELEASE build.

1.10.2-3.4.9.8 Checkpoint

Checkpoint for potential RELEASE build.

1.12.2-3.4.8.5 Checkpoint

Capture source for 1.12.2-3.4.7.5

1.11.2-3.4.8.5 Checkpoint

Captured source for 1.11.2-3.4.8.5

1.10.2-3.4.8.5 Checkpoint

Captured source for 1.10.2-3.4.8.5