v2.3.0

• Enabled .field() to handle objects (Affan Shahid)
• Added authentication with client certificates (terusus)
• Added .catch() for more Promise-like interface (Maxim Samoilov, Kornel Lesiński)
• Silenced errors from incomplete gzip streams for compatibility with web browsers (Kornel Lesiński)
• Fixed event.direction in uploads (Kornel Lesiński)
• Fixed returned value of overwritten response object's on() method (Juan Dopazo)