4.1.0

• Add support for ATmegaxx5/xx50 and ATmegaxx9/xx90 chip families (#287):
  • ATmega165, ATmega165P, ATmega169A, ATmega169P, ATmega325, ATmega3250, ATmega3250P, ATmega325P, ATmega329, ATmega3290, ATmega3290P, ATmega329P, ATmega645, ATmega6450, ATmega6450P, ATmega649, ATmega645P, ATmega649, ATmega6490, ATmega6490P, ATmega649P,
• Updated MCUdude's cores (#302):
  • MajorCore v2.2.1 (release notes)
  • MegaCore v2.2.2 (release notes)
  • MightyCore v2.2.1 (release notes)
  • MiniCore v2.2.1 (release notes)
• MCUdude cores switched to AVRDUDE v7.1

Thanks @MCUdude for your great contributions!