• Add the unique() method to columns and the uniqueKeys override to define unique constraints in Dart tables.
• Add the check() method to the Dart column builder to generate CHECK column constraints.
• Also apply type converters for json serialization and deserialization if they mix in JsonTypeConverter.
• Add the very experimental package:drift/wasm.dart library. It uses WebAssembly to access sqlite3 without any external JavaScript libraries, but requires you to add a WebAssembly module to the web/ folder.
  Please note that this specific library is not subject to semantic versioning until it leaves its experimental state. It also isn't suitable for production use at the moment.
• Internally use package:js to wrap sql.js.