[icons] Save 22 Megabytes from the package

[oliviertassinari]

Cut the package size by half. It should make the npm installation twice as fast. It's not OK to have some installation timeout.

Breaking change

We have removed the /es folder.

-import AccessAlarm from '@material-ui/icons/es/AccessAlarm';
+import AccessAlarm from '@material-ui/icons/AccessAlarm';

Closes #12432

[josgraha]

just wondering why did this prompt bumping to v3.x? what happened to 2.x? sorry, i couldn't track this convo down elsewhere

[oliviertassinari]

@josgraha What package are you referring to?

• @material-ui/icons was previously v2.0.0. It's a breaking change, so following semver, it's v3.0.0 now.
• @material-ui/core was previously v1.5.1. The Firefox drop requirement makes it a breaking change, so following semver, it would normally be v2.0.0. However, I think that it's easier for everybody to have core and icons using the same major version: v3.0.0.

P.S. I need to release a patch to fix a peer dependency warning. I'm on it.

[josgraha]

got it, thanks so much for the great work @oliviertassinari! also, thanks for explaining the versioning decision, it makes a lot of sense. cheers