docs: bump Vuepress & enable sw-update popup (#2116)

Author: ulivz

docs/.vuepress/config.js

@@ -25,6 +25,12 @@ module.exports = {
         selectText: 'Languages',
         lastUpdated: 'Last Updated',
         editLinkText: 'Edit this page on GitHub',
+        serviceWorker: {
+          updatePopup: {
+            message: "New content is available.",
+            buttonText: "Refresh"
+          }
+        },
         nav: [
           {
             text: 'Guide',
@@ -108,6 +114,12 @@ module.exports = {
         selectText: '选择语言',
         lastUpdated: '上次编辑时间',
         editLinkText: '在 GitHub 上编辑此页',
+        serviceWorker: {
+          updatePopup: {
+            message: "发现新内容可用",
+            buttonText: "刷新"
+          }
+        },
         nav: [
           {
             text: '指南',

docs/.vuepress/override.styl renamed to docs/.vuepress/style.styl

@@ -67,8 +67,8 @@
     "request-promise-native": "^1.0.5",
     "rimraf": "^2.6.2",
     "semver": "^5.5.0",
-    "vuepress": "^0.11.0",
-    "vuepress-theme-vue": "^1.0.3",
+    "vuepress": "^0.14.0",
+    "vuepress-theme-vue": "^1.1.0",
     "yorkie": "^1.0.2"
   },
   "resolutions": {