Actually fix the version number

configuration.gradle

@@ -6,7 +6,7 @@ import javax.tools.ToolProvider
 
 ext.mineTweakerVersion = "3.0.7"
 if (System.getenv('BUILD_NUMBER') != null)
-    project.mineTweakerVersion = System.getenv('BUILD_NUMBER')
+    project.mineTweakerVersion += "."+System.getenv('BUILD_NUMBER')
 else {
     try {
         ext.mineTweakerVersion += "." + "git rev-parse --abbrev-ref HEAD".execute().text.trim();