Update to graphql-java 4.2

Author: apottere

build.gradle

@@ -55,7 +55,7 @@ dependencies {
     compile 'commons-fileupload:commons-fileupload:1.3.1'
 
     // GraphQL
-    compile 'com.graphql-java:graphql-java:4.1'
+    compile 'com.graphql-java:graphql-java:4.2'
 
     compileOnly 'com.graphql-java:graphql-java-annotations:0.13.1'
     testCompile 'com.graphql-java:graphql-java-annotations:0.13.1'