message: fix(dev): Allow ember-canary to fail
  As suggested in `ember-try`'s README (https://github.com/ember-cli/ember-try#configuration-files).
diff: @@ -40,6 +40,7 @@ module.exports = async function() {
  },
  {
  name: 'ember-canary',
  + allowedToFail: true,
  npm: {
  devDependencies: {
  'ember-source': await getChannelURL('canary'),
  