docs: update vuepress; use service work

docs/.vuepress/config.js

@@ -2,11 +2,18 @@ module.exports = {
     title: 'RSSHub',
     description: '🍰 万物皆可 RSS',
     ga: 'UA-48084758-10',
-    serviceWorker: false,
+    serviceWorker: true,
     themeConfig: {
         repo: 'DIYgod/RSSHub',
         editLinks: true,
-        editLinkText: '帮助我们改善此页面！',
+        editLinkText: '在 GitHub 上编辑此页',
+        lastUpdated: '上次更新',
+        serviceWorker: {
+            updatePopup: {
+                message: '发现新内容可用',
+                buttonText: '刷新',
+            },
+        },
         docsDir: 'docs',
         nav: [
             {

package.json

@@ -33,7 +33,7 @@
     "lint-staged": "^7.2.0",
     "prettier": "^1.13.7",
     "prettier-check": "^2.0.0",
-    "vuepress": "0.12.0",
+    "vuepress": "0.13.0",
     "yorkie": "^1.0.3"
   },
   "dependencies": {

yarn.lock

@@ -6022,9 +6022,9 @@ regexpu-core@^4.1.3, regexpu-core@^4.1.4:
     unicode-match-property-ecmascript "^1.0.3"
     unicode-match-property-value-ecmascript "^1.0.1"
 
-register-service-worker@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.npmjs.org/register-service-worker/-/register-service-worker-1.2.0.tgz#c0472dcc856e391ba7a87c0aa96c4f6cf1aec67c"
+register-service-worker@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/register-service-worker/-/register-service-worker-1.4.1.tgz#4b4c9b4200fc697942c6ae7d611349587b992b2f"
 
 registry-auth-token@^3.0.1:
   version "3.3.2"
@@ -7196,9 +7196,9 @@ vuepress-html-webpack-plugin@^3.2.0:
     toposort "^1.0.0"
     util.promisify "1.0.0"
 
-vuepress@0.12.0:
-  version "0.12.0"
-  resolved "https://registry.npmjs.org/vuepress/-/vuepress-0.12.0.tgz#1a268c34622fa5869db3883da5e0f9ef8609d5a0"
+vuepress@0.13.0:
+  version "0.13.0"
+  resolved "https://registry.yarnpkg.com/vuepress/-/vuepress-0.13.0.tgz#7959feeb8c4bbd1cd96238383566182419576d5d"
   dependencies:
     "@babel/core" "7.0.0-beta.47"
     "@vue/babel-preset-app" "3.0.0-beta.11"
@@ -7238,7 +7238,7 @@ vuepress@0.12.0:
     portfinder "^1.0.13"
     postcss-loader "^2.1.5"
     prismjs "^1.13.0"
-    register-service-worker "^1.2.0"
+    register-service-worker "^1.4.1"
     semver "^5.5.0"
     stylus "^0.54.5"
     stylus-loader "^3.0.2"