CullLeaves 3.1.0 - Update to 1.20

- Update to 1.20
- Attempt to fix random BufferUnderflowExceptions with Sodium once and for all

build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id "architectury-plugin" version "3.4-SNAPSHOT"
-    id "dev.architectury.loom" version "1.0-SNAPSHOT" apply false
+    id "dev.architectury.loom" version "1.1-SNAPSHOT" apply false
 }
 
 architectury {
@@ -26,7 +26,7 @@ subprojects {
         // The following line declares the mojmap mappings, you may use other mappings as well
         //mappings loom.officialMojangMappings()
         // The following line declares the yarn mappings you may select this one as well.
-        mappings "net.fabricmc:yarn:1.19.3+build.5:v2"
+        mappings "net.fabricmc:yarn:${rootProject.yarn_mappings}:v2"
     }
 }