workflow: setup eslint for prohibited syntax and globals

fix #1285

packages/reactivity/src/baseHandlers.ts

@@ -1,7 +1,14 @@
 import { reactive, readonly, toRaw, ReactiveFlags } from './reactive'
 import { TrackOpTypes, TriggerOpTypes } from './operations'
 import { track, trigger, ITERATE_KEY } from './effect'
-import { isObject, hasOwn, isSymbol, hasChanged, isArray } from '@vue/shared'
+import {
+  isObject,
+  hasOwn,
+  isSymbol,
+  hasChanged,
+  isArray,
+  extend
+} from '@vue/shared'
 import { isRef } from './ref'
 
 const builtInSymbols = new Set(
@@ -167,16 +174,22 @@ export const readonlyHandlers: ProxyHandler<object> = {
   }
 }
 
-export const shallowReactiveHandlers: ProxyHandler<object> = {
-  ...mutableHandlers,
-  get: shallowGet,
-  set: shallowSet
-}
+export const shallowReactiveHandlers: ProxyHandler<object> = extend(
+  {},
+  mutableHandlers,
+  {
+    get: shallowGet,
+    set: shallowSet
+  }
+)
 
 // Props handlers are special in the sense that it should not unwrap top-level
 // refs (in order to allow refs to be explicitly passed down), but should
 // retain the reactivity of the normal readonly object.
-export const shallowReadonlyHandlers: ProxyHandler<object> = {
-  ...readonlyHandlers,
-  get: shallowReadonlyGet
-}
+export const shallowReadonlyHandlers: ProxyHandler<object> = extend(
+  {},
+  readonlyHandlers,
+  {
+    get: shallowReadonlyGet
+  }
+)