hack to prevent tests from failing (error with firebase see firebase/…

…firebase-js-sdk#1455 (comment))

vue.config.js

@@ -0,0 +1,15 @@
+// hack to prevent tests from failing with firebase build
+const regex = /firebase\/(app|firestore)/;
+
+module.exports = {
+  configureWebpack: {
+    externals: ['/node_modules/', function(context, request, callback) {
+
+      // exclude firebase products from being bundled, so they will be loaded using require() at runtime.
+      if(regex.test(request)) {
+        return callback(null, 'commonjs ' + request);
+      }
+      callback();
+    }]
+  }
+}