chore(eslint): fixes eslint in @casl/ability

Also converts arrow function style stuff to be warnings

Author: stalniy

.eslintrc

@@ -10,6 +10,8 @@
     "no-mixed-operators": 0,
     "no-prototype-builtins": 0,
     "no-confusing-arrow": 0,
-    "no-bitwise": ["error", { "allow": ["^"] }]
+    "no-bitwise": ["error", { "allow": ["^"] }],
+    "no-return-assign": 1,
+    "arrow-body-style": 1
   }
 }

packages/casl-ability/spec/rules_to_fields.spec.js

@@ -34,7 +34,6 @@ describe('rulesToFields', () => {
       can('read', 'Post', { 'state.private': true })
     })
     const object = rulesToFields(ability, 'read', 'Post')
-    console.log(object)
 
     expect(object).to.deep.equal({
       id: 5,

packages/casl-ability/src/extra.js

@@ -1,4 +1,4 @@
-import { getByPath, setByPath } from './utils';
+import { setByPath } from './utils';
 
 export function rulesToQuery(ability, action, subject, convert) {
   const query = {};

packages/casl-ability/src/utils.js

@@ -3,8 +3,8 @@ export function wrapArray(value) {
 }
 
 export function setByPath(object, path, value) {
-  let ref = object
-  let lastKey = path
+  let ref = object;
+  let lastKey = path;
 
   if (path.indexOf('.') !== -1) {
     const keys = path.split('.');