Can't upgrade to latest ionic

[moldstadt]

After trying to upgrade to the latest version of ionic-angular and ionic/app-scripts, I get the following error when trying to get the list of projects:

ERROR TypeError: querystring.escape is not a function
    at aws4.js:237
    at Array.reduce (<anonymous>)
    at RequestSigner.canonicalString (aws4.js:232)
    at RequestSigner.stringToSign (aws4.js:196)
    at RequestSigner.signature (aws4.js:188)
    at RequestSigner.authHeader (aws4.js:173)
    at RequestSigner.sign (aws4.js:144)
    at Object.aws4.sign (aws4.js:331)
    at Sigv4Http.webpackJsonp.96.Sigv4Http._request (sigv4.service.ts:65)
    at Sigv4Http.webpackJsonp.96.Sigv4Http.request (sigv4.service.ts:30)

It seems like it is using the wrong version of querystring, not the one specified in the custom webpack.config.js. Has something changed in ionic that causes this not to work anymore?

[moldstadt]

If anyone else is having this problem, the reason is that ionic/app-scripts has changed its webpack.config.js. Use the new version available from here, and add the alias for both the development and production configs:

	...
	resolve: {
		extensions: ['.ts', '.js', '.json'],
		modules: [path.resolve('node_modules')],
		alias: {
			querystring: 'querystring-browser'
		}
	},
	...