v5.2.1

• New: adjusted several types to be more in-sync with @types/node@14.
• New: writeFile/writeFileSync now accepts a Uint8Array instead of just Buffer.
• Fix: return type of readFile/readFileSync now handles "utf-8" and other updated BufferEncoding values.
• Fix: combined overload of readFile/readFileSync no longer accepts a wide string as encoding, giving better auto-completions.