Babel Polyfill Loaded Twice

[heathharrelson]

As shown in #228, a warning is logged to the console about loading the Babel polyfill twice when Vizr is loaded.

REDCap is now bundling JavaScript resources using Webpack, and they are loading the polyfill as well:

// from Resources/webpack/webpack.config.js
const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = {
  entry: {
    main: ["babel-polyfill", './src/app.js']
  },
  // ...
}

We should either use the noconflict polyfill as mentioned in the warning or reconfigure Babel not to apply the polyfill at all. Note that the latter will require bumping the minimum supported REDCap version.