2.6.1

Changes from 2.5.1: Support 1.18.x, use GRADLE_USER_HOME if specified

Supported Minecraft versions:

1.7.10
1.8.9
1.9.4
1.10.2
1.11.2
1.12.2
1.14.4
1.15.2
1.16.2, 1.16.3, 1.16.4, 1.16.5
1.17.1
1.18.1

Official mappings may conflict on untested optifine versions.