Merge branch 'tz-update-vue-libraries' into 'master'

Updated all Vue libraries

See merge request gitlab-org/gitlab-ce!15554

package.json

@@ -66,11 +66,11 @@
     "underscore": "^1.8.3",
     "url-loader": "^0.5.8",
     "visibilityjs": "^1.2.4",
-    "vue": "^2.5.2",
-    "vue-loader": "^11.3.4",
+    "vue": "^2.5.8",
+    "vue-loader": "^13.5.0",
     "vue-resource": "^1.3.4",
-    "vue-template-compiler": "^2.5.2",
-    "vuex": "^3.0.0",
+    "vue-template-compiler": "^2.5.8",
+    "vuex": "^3.0.1",
     "webpack": "^3.5.5",
     "webpack-bundle-analyzer": "^2.8.2",
     "webpack-stats-plugin": "^0.1.5"