chore(deps): Update immutables to v2.12.2 (#160)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ run-task = "3.0.2"
 
 cloudCore = "2.0.0"
 
-immutables = "2.12.1"
+immutables = "2.12.2"
 
 brigadier = "1.0.18"
 bukkit = "1.13.2-R0.1-SNAPSHOT"