v1.2.1

Changed

• Linting and formatting migrated from ESLint (airbnb-base) + Prettier to Ultracite on Biome. npm run lint now runs ultracite check; a new lint:fix script applies fixes. Config lives in biome.jsonc (single quotes and no semicolons preserved).
• Source and tests reformatted to the Ultracite style, with small behavior-neutral refactors to satisfy its rules: bare catch for unused error bindings, for...of instead of forEach/spread-accumulating reduce in cookieJar, hoisted regex in parseTimeUnit, Date.now() in tests, alphabetized object keys.

No changes to the published API.

Full changelog: v1.2.0...v1.2.1