chore(.vuepress): upgrade vuepress to 0.14.8

Upgraded to latest patch version of vuepress to gain configFile: false fix for babel config. See
vuejs/vuepress#797 for more details.

package.json

@@ -85,7 +85,7 @@
     "vue-router": "^3.0.1",
     "vue-server-renderer": "^2.6.11",
     "vue-template-compiler": "^2.6.11",
-    "vuepress": "^0.14.2",
+    "vuepress": "^0.14.8",
     "vuepress-theme-vue": "^1.0.3",
     "vuex": "^3.0.1",
     "webpack": "^3.0.1",

yarn.lock

@@ -9233,9 +9233,10 @@ min-document@^2.19.0:
   dependencies:
     dom-walk "^0.1.0"
 
-mini-css-extract-plugin@^0.4.1:
+mini-css-extract-plugin@0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.4.1.tgz#d2bcf77bb2596b8e4bd9257e43d3f9164c2e86cb"
+  integrity sha512-XWuB3G61Rtasq/gLe7cp5cuozehE6hN+E4sxCamRR/WDiHTg+f7ZIAS024r8UJQffY+e2gGELXQZgQoFDfNDCg==
   dependencies:
     "@webpack-contrib/schema-utils" "^1.0.0-beta.0"
     loader-utils "^1.1.0"
@@ -13501,9 +13502,10 @@ vuepress-theme-vue@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/vuepress-theme-vue/-/vuepress-theme-vue-1.0.3.tgz#8465434401bc99325de53ba038e1eed2d2ec84b9"
 
-vuepress@^0.14.2:
-  version "0.14.2"
-  resolved "https://registry.yarnpkg.com/vuepress/-/vuepress-0.14.2.tgz#48e5e102178370980d1408e230c0263d768435b7"
+vuepress@^0.14.8:
+  version "0.14.11"
+  resolved "https://registry.yarnpkg.com/vuepress/-/vuepress-0.14.11.tgz#fc6ba0e609e3433a8070e95301b4d987712b2a08"
+  integrity sha512-5iB7iWeEG7GtEiNwmS2LOcifp2V93aZ4+oO9pq8OcUgOWay9/NqmNqzg7KQ7AJ0puZGg0tYwUKKjifIWIPE8jQ==
   dependencies:
     "@babel/core" "7.0.0-beta.47"
     "@vue/babel-preset-app" "3.0.0-beta.11"
@@ -13537,7 +13539,7 @@ vuepress@^0.14.2:
     markdown-it-container "^2.0.0"
     markdown-it-emoji "^1.4.0"
     markdown-it-table-of-contents "^0.4.0"
-    mini-css-extract-plugin "^0.4.1"
+    mini-css-extract-plugin "0.4.1"
     nprogress "^0.2.0"
     optimize-css-assets-webpack-plugin "^4.0.0"
     portfinder "^1.0.13"