Merge pull request #201 from richharms/graphql-java-11-fix

Switch from getType() to getUnwrappedNonNullType() in EnhancedExecutionStrategy

Author: yarinvak

src/main/java/graphql/annotations/strategies/EnhancedExecutionStrategy.java

@@ -31,7 +31,7 @@ public class EnhancedExecutionStrategy extends AsyncSerialExecutionStrategy {
 
     @Override
     protected CompletableFuture<ExecutionResult> resolveField(ExecutionContext executionContext, ExecutionStrategyParameters parameters) {
-        GraphQLObjectType parentType = (GraphQLObjectType) parameters.getExecutionStepInfo().getType();
+        GraphQLObjectType parentType = (GraphQLObjectType) parameters.getExecutionStepInfo().getUnwrappedNonNullType();
         GraphQLFieldDefinition fieldDef = getFieldDef(executionContext.getGraphQLSchema(), parentType, parameters.getField().get(0));
         if (fieldDef == null) return null;