code style fixes after CR

Author: felipesabino

src/type-factory/interface.type-factory.ts

@@ -9,9 +9,7 @@ let interfaceTypeCache: { [key: string]: any } = {};
 export function interfaceTypeFactory(target: any): graphql.GraphQLInterfaceType | undefined {
   return getMetadataBuilder().buildInterfaceTypeMetadata(target)
     .map(metadata => {
-      if (interfaceTypeCache[metadata.name]) {
-        return interfaceTypeCache[metadata.name];
-      } else {
+      if (!interfaceTypeCache[metadata.name]) {
         interfaceTypeCache[metadata.name] = new graphql.GraphQLInterfaceType({
           description: metadata.description,
           name: metadata.name,
@@ -27,8 +25,8 @@ export function interfaceTypeFactory(target: any): graphql.GraphQLInterfaceType
               return fields;
             } , {} as { [key: string]: any}),
         });
-        return interfaceTypeCache[metadata.name];
       }
+      return interfaceTypeCache[metadata.name];
     })
     .find((_, index) => index === 0);
 }

src/type-factory/object.type-factory.ts

@@ -30,10 +30,7 @@ export function objectTypeFactory(target: Function, isInput: boolean = false): g
           }
           const fieldMetadataList: { target: Function, field: FieldMetadata}[] = getMetadataBuilder()
             .buildFieldMetadata(target.prototype)
-            .map(field => ({
-              target: target,
-              field: field,
-            }))
+            .map(field => ({ target, field }))
             .concat(
               flatten(
                 metadata.interfaces.map(interfaceMetadata => flatten(