build to gql java 12

Author: yarinvak

build.gradle

@@ -37,12 +37,6 @@ task javadocJar(type: Jar, dependsOn: javadoc) {
     from javadoc.destinationDir
 }
 
-idea {
-    project {
-        languageLevel = '1.8'
-        vcs = 'Git'
-    }
-}
 release {
     tagTemplate = 'v${version}'
     failOnPublishNeeded = false
@@ -69,7 +63,7 @@ gradle.projectsEvaluated {
 
 dependencies {
     compile 'javax.validation:validation-api:1.1.0.Final'
-    compile 'com.graphql-java:graphql-java:11.0'
+    compile 'com.graphql-java:graphql-java:12.0'
 
     // OSGi
     compileOnly 'org.osgi:org.osgi.core:6.0.0'