Fix publishing warn, go back to loom 0.11 as 0.12 is not yet recommended

See https://github.com/FabricMC/fabric-example-mod/commit/8adede095a379f0f18984d1ec2b4a46a4b5d29a7

build.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id 'fabric-loom' version '0.12-SNAPSHOT'
+	id 'fabric-loom' version '0.11-SNAPSHOT'
 	id 'io.github.juuxel.loom-quiltflower' version '1.7.1'
 	id 'maven-publish'
 }
@@ -65,17 +65,7 @@ jar {
 
 // configure the maven publication
 publishing {
-	publications {
-		mavenJava(MavenPublication) {
-			// add all the jars that should be included when publishing to maven
-			artifact(remapJar) {
-				builtBy remapJar
-			}
-			artifact(sourcesJar) {
-				builtBy remapSourcesJar
-			}
-		}
-	}
+	from components.java
 
 	// Select the repositories you want to publish to
 	// To publish to maven local, no extra repositories are necessary. Just use the task `publishToMavenLocal`.