v9.2.1-canary.8

Patches

• Update error for failing to parse custom-route source: #10197
• Disable core-js on Next.js core files as it's not transforming…: #10193
• Fix ESLint Ignores and Extract Fn: #10205
• Dedupe CSS Regexes: #10206
• Use builtins for React transform: #10207
• Extract CSS Loaders into Separate Files: #10210

Credits

Huge thanks to @ijjk and @Timer for helping!