12.0.0-beta.9

💥 Breaking Change

• Extract ReScript runtime files from main rescript package to separate @rescript/runtime package. #7796
• Remove @rescript/std (in favor of @rescript/runtime). #7811

🚀 New Feature

• Add support for ArrayBuffer and typed arrays to @unboxed. #7788
• Experimental: Add let? syntax for unwrapping and propagating errors/none as early returns for option/result types. #7582
• Add support for shipping features as experimental, including configuring what experimental features are enabled in rescript.json. #7582

🐛 Bug fix

• Fix JS regex literal parsing in character classes. #7790
• Fix creating interface for functions with upper bounded polymorphic args. #7786

💅 Polish

• Make parser less strict around leading attributes. #7787
• Dedicated error message for ternary type mismatch. #7804
• Dedicated error message for passing a braced ident to something expected to be a record. #7806
• Hint about partial application when missing required argument in function call. #7807
• More autocomplete improvements involving modules and module types. #7795
• Autocomplete @react.componentWithProps attribute. #7812
• Add some missing iframe attributes to domProps. #7813
• Polish error message for inline record escaping scope. #7808
• Formatter: Change placement of closing > in JSX. #7803

🏠 Internal

• Build runtime with rewatch on Windows, too. #7794