docs: Add a GA tag

docs/.vuepress/config.js

@@ -25,5 +25,13 @@ module.exports = {
     editLinks: true,
     // custom text for edit link. Defaults to "Edit this page"
     editLinkText: 'Edit this page on GitHub'
-  }
+  },
+  plugins: [
+    [
+      '@vuepress/google-analytics',
+      {
+        'ga': 'UA-71160903-4'
+      }
+    ]
+  ]
 }

docs/package-lock.json

@@ -1060,6 +1060,12 @@
         "lodash.throttle": "^4.1.1"
       }
     },
+    "@vuepress/plugin-google-analytics": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@vuepress/plugin-google-analytics/-/plugin-google-analytics-1.0.3.tgz",
+      "integrity": "sha512-mqFFQSJjQp5zscZJ0Ik+YDLV7sZSAO8w13CG8c5WsUCjy+0oWhqAw/NjpVrEK8Y/PdYPe4l/OE5jMUU5AqRRjg==",
+      "dev": true
+    },
     "@vuepress/plugin-last-updated": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/@vuepress/plugin-last-updated/-/plugin-last-updated-1.0.2.tgz",

docs/package.json

@@ -4,6 +4,7 @@
     "build": "vuepress build"
   },
   "devDependencies": {
+    "@vuepress/plugin-google-analytics": "^1.0.3",
     "vuepress": "^1.0.2"
   }
 }