Update to 1.20.4, and just generally fixing up code. This version actually runs!

gradle.properties

@@ -1,15 +1,17 @@
 # gradle.properties
 
+kotlin.code.style=official
+
 # Done to increase the memory available to gradle.
 org.gradle.jvmargs=-Xmx1G
 org.gradle.parallel=true
 
 # Fabric Properties
 # check these on https://fabricmc.net/develop
-minecraft_version=1.19.4
-yarn_mappings=1.19.4+build.2
-loader_version=0.15.6
-fabric_kotlin_version=1.10.17+kotlin.1.9.22
+minecraft_version=1.20.4
+yarn_mappings=1.20.4+build.3
+loader_version=0.15.11
+fabric_kotlin_version=1.11.0+kotlin.2.0.0
 
 # yeah
 modmenu_version=9.0.0
@@ -20,4 +22,4 @@ maven_group=chickenmanfy.scify
 archives_base_name=scify
 
 # Dependencies
-fabric_version=0.87.2+1.19.4
+fabric_version=0.97.1+1.20.4