Fixed no-side-effects-in-computed-properties when el is object (#1226)

* Fix scopeStack

* Remove comma

Author: ktmouk

lib/rules/no-side-effects-in-computed-properties.js

@@ -31,15 +31,9 @@ module.exports = {
   create(context) {
     /** @type {Map<ObjectExpression, ComponentComputedProperty[]>} */
     const computedPropertiesMap = new Map()
-    /**
-     * @typedef {object} ScopeStack
-     * @property {ScopeStack} upper
-     * @property {BlockStatement | Expression} body
-     */
-    /**
-     * @type {ScopeStack}
-     */
-    let scopeStack
+
+    /** @type { { upper: any, body: null | BlockStatement | Expression } } */
+    let scopeStack = { upper: null, body: null }
 
     /** @param {FunctionExpression | ArrowFunctionExpression | FunctionDeclaration} node */
     function onFunctionEnter(node) {

tests/lib/rules/no-side-effects-in-computed-properties.js

@@ -173,6 +173,13 @@ ruleTester.run('no-side-effects-in-computed-properties', rule, {
         }
       })`,
       parserOptions
+    },
+    {
+      code: `const test = { el: '#app' }
+        Vue.component('test', {
+        el: test.el
+      })`,
+      parserOptions
     }
   ],
   invalid: [