0.6.1-rc.1

Change set since 0.5.4:

2625298: 0.6.0-rc.1
b386ff2: Upgrade to minecraft 1.18.2
c68f135: Adjust cache storage
b6c305b: Use synchronized map for slide state cache
4aa1eae: Add support for 1.18 forge (#11)
8442a53: fix CI
c69c832: update build.gradle
19d9ec3: update some code
0750bd0: update 1.18
61bda7f: update mappings and forge
e591626: Update license to 2020-2021