Exclude moment from chart.js from webpack.

config/webpack.config.common.js

@@ -14,6 +14,9 @@ const webpackConfig = function(isDev) {
         vue$: isDev ? "vue/dist/vue.min.js" : "vue/dist/vue.min.js",
         "@": helpers.root("src")
       }
+    },
+     externals: {
+        moment: 'moment' // comes with chart.js
     },
     module: {
       rules: [