Actually use alpha4 over SNAPSHOT

build.gradle

@@ -22,7 +22,7 @@ repositories {
 
 }
 
-ext.jmeFullVersion = "3.1.0-SNAPSHOT" //"3.1.0-alpha3" 
+ext.jmeFullVersion = "3.1.0-alpha4" //3.1.0-SNAPSHOT
 ext.jmeNbmRevision = 0
 
 configurations {