ESLint: enable 'arrow-body-style' rule

.eslintrc.yml

@@ -259,7 +259,7 @@ rules:
   # ECMAScript 6
   # https://eslint.org/docs/rules/#ecmascript-6
 
-  arrow-body-style: off # TODO error
+  arrow-body-style: error
   constructor-super: error
   no-class-assign: error
   no-const-assign: error

src/__tests__/starWarsSchema.js

@@ -118,9 +118,7 @@ const { nodeInterface, nodeField } = nodeDefinitions(
       return getShip(id);
     }
   },
-  (obj) => {
-    return obj.ships ? factionType : shipType;
-  },
+  (obj) => (obj.ships ? factionType : shipType),
 );
 
 /**

src/mutation/mutation.js

@@ -96,13 +96,12 @@ export function mutationWithClientMutationId(
     args: {
       input: { type: new GraphQLNonNull(inputType) },
     },
-    resolve: (_, { input }, context, info) => {
-      return Promise.resolve(mutateAndGetPayload(input, context, info)).then(
+    resolve: (_, { input }, context, info) =>
+      Promise.resolve(mutateAndGetPayload(input, context, info)).then(
         (payload) => {
           payload.clientMutationId = input.clientMutationId;
           return payload;
         },
-      );
-    },
+      ),
   };
 }

src/node/__tests__/nodeasync.js

@@ -26,12 +26,8 @@ const userData = {
 };
 
 const { nodeField, nodeInterface } = nodeDefinitions(
-  (id) => {
-    return userData[id];
-  },
-  () => {
-    return userType;
-  },
+  (id) => userData[id],
+  () => userType,
 );
 
 const userType = new GraphQLObjectType({