Vuepress 1.0 (#843)

* bump vuepress

* extend default-theme, implement codefund

package.json

@@ -30,6 +30,8 @@
     "@babel/preset-env": "^7.4.2",
     "@babel/runtime": "^7.4.2",
     "@vue/test-utils": "^1.0.0-beta.29",
+    "@vuepress/plugin-google-analytics": "^1.0.0-alpha.47",
+    "@vuepress/plugin-pwa": "^1.0.0-alpha.47",
     "autoprefixer": "^9.4.7",
     "babel-core": "^7.0.0-bridge.0",
     "babel-loader": "^8.0.5",
@@ -59,7 +61,7 @@
     "vue-server-renderer": "^2.6.10",
     "vue-style-loader": "^4.1.2",
     "vue-template-compiler": "^2.6.10",
-    "vuepress": "^0.14.10",
+    "vuepress": "^1.0.0-alpha.47",
     "vuex": "^3.1.0",
     "webpack": "^4.29.6",
     "webpack-cli": "^3.3.0",