Upgraded graphql-java-servlet to JDK 11 #169

Author: oliemansm

build.gradle

@@ -14,8 +14,8 @@ plugins {
 }
 
 apply plugin: 'java'
-sourceCompatibility = '1.8'
-targetCompatibility = '1.8'
+sourceCompatibility = 11
+targetCompatibility = 11
 
 // Tests
 apply plugin: 'groovy'
@@ -202,7 +202,11 @@ artifactory {
 
 idea {
     project {
-        languageLevel = '1.8'
+        languageLevel = '11'
         vcs = 'Git'
     }
 }
+
+wrapper {
+    gradleVersion = '4.10.3'
+}

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,6 @@
-#Wed Apr 25 17:03:16 EDT 2018
+#Thu Jun 20 12:32:36 CEST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-all.zip