fix: util lint

src/components/DocumentTitle/util.js

-export const setDocumentTitle = function (title) {
-  document.title = title
-  const ua = navigator.userAgent
-  // eslint-disable-next-line
-  const regex = /\bMicroMessenger\/([\d\.]+)/
-  if (regex.test(ua) && /ip(hone|od|ad)/i.test(ua)) {
-    const i = document.createElement('iframe')
-    i.src = '/favicon.ico'
-    i.style.display = 'none'
-    i.onload = function () {
-      setTimeout(function () {
-        i.remove()
-      }, 9)
-    }
-    document.body.appendChild(i)
-  }
-}
+export const setDocumentTitle = function (title) {
+  document.title = title
+  const ua = navigator.userAgent
+  // eslint-disable-next-line
+  const regex = /\bMicroMessenger\/([\d\.]+)/
+  if (regex.test(ua) && /ip(hone|od|ad)/i.test(ua)) {
+    const i = document.createElement('iframe')
+    i.src = '/favicon.ico'
+    i.style.display = 'none'
+    i.onload = function () {
+      setTimeout(function () {
+        i.remove()
+      }, 9)
+    }
+    document.body.appendChild(i)
+  }
+}

test/index.test.js

-import Vue from 'vue'
-import { mount } from '@vue/test-utils'
-import BlockLayout from '../src/BlockLayout'
-
-describe('BlockLayout', () => {
-
-  it('should render BlockLayout', () => {
-    const wrapper = mount({
-      render () {
-        return (
-          <div>
-           <BlockLayout>
-             <span>demo</span>
-           </BlockLayout>
-          </div>
-        )
-      }
-    })
-    expect(wrapper).toMatchSnapshot()
-  })
-
-})
+import Vue from 'vue'
+import { mount } from '@vue/test-utils'
+import BlockLayout from '../src/BlockLayout'
+
+describe('BlockLayout', () => {
+
+  it('should render BlockLayout', () => {
+    const wrapper = mount({
+      render () {
+        return (
+          <div>
+           <BlockLayout>
+             <span>demo</span>
+           </BlockLayout>
+          </div>
+        )
+      }
+    })
+    expect(wrapper).toMatchSnapshot()
+  })
+
+})