- Updated Arduino AVR core to v1.8.7 (release notes)
- Updated MCUdude cores:
- MajorCore v3.1.0 (release notes)
- MegaCore v3.1.0 (release notes)
- MightyCore v3.1.0 (release notes)
- MiniCore v3.1.2 (release notes)
- MicroCore v2.5.2 (release notes)
- Updated AVRDUDE packages to v8.1 for MCUdude cores (release notes)