Bump Version & Forge

Bumped Forge to be compatible with https://github.com/MinecraftForge/MinecraftForge/pull/8300 change

gradle.properties

@@ -8,11 +8,11 @@ org.gradle.jvmargs=-Xmx3G
 	loader_version=0.13.3
 
 # Mod Properties
-	mod_version = 0.5.5
+	mod_version = 0.5.6
 	maven_group = me.jellysquid.mods
 	archives_base_name = rubidium
 	
-	forge_version=40.0.2
+	forge_version=40.2.1
 
 	loom.platform=forge