Use babel polyfills and support more browsers
What does this MR do?
We didn't have polyfills enabled before, so older browsers would fail if we used fancier built-in things.
Object.assign() is missing in ie mobile 11 and caused an error, see https://sentry.io/foodsaving-worldwide/foodsharingde-beta-frontend/issues/511109506/.
Instead of importing babel-polyfill, we can use the new
useBuiltins: usage option in babel 7 (see https://github.com/babel/babel/tree/master/packages/babel-preset-env#usebuiltins-usage) to add just the ones we need.
To specify the browsers to include we have a browserslist config in package.json now. You can try out the queries to see which browsers it'll match using http://browserl.ist/.
How confident are you it won't break things if deployed?
Should improve things that are currently broken.
Links to related issues
- added a test, or explain why one is not needed/possible... we don't have testing setup to run different browsers...
- no unrelated changes
- asked someone for a code review
- joined #foodsharing-beta channel at https://slackin.yunity.org
- added an entry to CHANGELOG.md (description, merge request link, username(s))