Make sure the annotations page can be displayed

Author: MaybeJustJames

babel.config.js

@@ -10,5 +10,6 @@ module.exports = {
     ],
     '@babel/preset-react'
   ],
-  plugins: ['@babel/plugin-transform-runtime']
+  plugins: ['@babel/plugin-transform-runtime',
+           ["@babel/plugin-proposal-private-methods", { "loose": true }]]
 };