NULL -> ALLOW_NULL

Author: martinbonnin

src/main/java/graphql/Enums.java

@@ -11,7 +11,7 @@
 public class Enums {
     static final String ON_ERROR = "OnError";
     public static final String ON_ERROR_PROPAGATE = "PROPAGATE";
-    static final String ON_ERROR_NULL = "NULL";
+    static final String ON_ERROR_NULL = "ALLOW_NULL";
 
     @ExperimentalApi
     public static final EnumTypeDefinition ON_ERROR_TYPE_DEFINITION;

src/test/groovy/graphql/execution/NoErrorPropagationTest.groovy

@@ -23,7 +23,7 @@ class NoErrorPropagationTest extends Specification {
         def graphql = GraphQL.newGraphQL(schema).build()
 
         def query = '''
-            query GetFoo @errorHandling(onError: NULL) { foo }
+            query GetFoo @errorHandling(onError: ALLOW_NULL) { foo }
         '''
         when: