add compatibility directives

Frotty · Frotty · commit 36651282412a · 2019-01-19T18:19:24.000+01:00
diff --git a/de.peeeq.wurstscript/build.gradle b/de.peeeq.wurstscript/build.gradle
@@ -27,6 +27,9 @@ import java.util.regex.Pattern
 mainClassName = "de.peeeq.wurstio.Main"
 version = "1.8.0.0"
 
+sourceCompatibility = '1.8'
+targetCompatibility = '1.8'
+
 jacocoTestReport {
     reports {
         xml.enabled true
