webpack: Whitelist atlaskit and react-spinkit stuff from nodeExternals

When building as a library, all of the externals get require'd
immediately before we have a chance to monkey-patch them, which
breaks on node, because those requirements use things that are
only defined in the browser. Instead, just bundle them, which means
that this behaviour does not occurr.

internals/webpack/webpack.prod.serverless.babel.js

@@ -8,7 +8,19 @@ module.exports = require('./webpack.prod.babel')({
     path.join(process.cwd(), 'lambda.js'),
   ],
 
-  externals: [nodeExternals()],
+  externals: [nodeExternals({
+    // Need to whitelist @atlaskit/dropdown-menu things here,
+    // otherwise when building the library it gets directly required, which in
+    // turn causes node to trip up because navigator is not defined.
+    whitelist: [
+      '@atlaskit/avatar',
+      '@atlaskit/dropdown-menu',
+      '@atlaskit/droplist',
+      '@atlaskit/navigation',
+      'react-spinkit',
+      'loaders.css',
+    ],
+  })],
 
   output: {
     filename: 'prodLambda.js',