refactor: add eslint-plugin-vue && lint code (#976)

src/views/errorPage/404.vue

@@ -10,7 +10,7 @@
       <div class="bullshit">
         <div class="bullshit__oops">OOPS!</div>
         <div class="bullshit__info">版权所有
-          <a class='link-type' href='https://wallstreetcn.com' target='_blank'>华尔街见闻</a>
+          <a class="link-type" href="https://wallstreetcn.com" target="_blank">华尔街见闻</a>
         </div>
         <div class="bullshit__headline">{{ message }}</div>
         <div class="bullshit__info">请检查您输入的网址是否正确，请点击以下按钮返回主页或者发送错误报告</div>
@@ -23,7 +23,7 @@
 <script>
 
 export default {
-  name: 'page404',
+  name: 'Page404',
   computed: {
     message() {
       return '网管说这个页面你不能进......'