3.0.0

• Updated cores:
  • Arduino AVR v1.8.3
  • MightyCore v2.0.6 (release notes)
  • MiniCore v2.0.7 (release notes)
  • MegaCore v2.0.4 (release notes)
  • MajorCore v2.0.3 (release notes)
  • MicroCore v1.0.7 (release notes)
• Added initial support for avr-stub debug tool based on avr_debug GDB stub (special thanks to @msquirogac) (#205)
• Improved support for more flexible fuses and bootloader programming. More information with examples in the docs
• Minor fixes and improvements (issues #201, #203, #206)

Note

This release deprecates the program target used for uploading firmware via an external programmer.
Instead a custom upload_command option should be used.