Update de.hhu.stups.sablecc Gradle plugin to version 1.1.0

This hopefully fixes the deprecation warnings about undeclared
dependencies of the sourcesJar task that appear sometimes.

build.gradle

@@ -3,7 +3,7 @@ plugins {
 	id("maven-publish")
 	id("signing")
 	
-	id("de.hhu.stups.sablecc").version("1.0.0")
+	id("de.hhu.stups.sablecc").version("1.1.0")
 }
 
 project.group = "de.hhu.stups"