IDE

• Live font resize now applies to console and serial monitor too @Pieter12345
• Make it easier to build the IDE from sources on Windows @Pieter12345
• Smaller Preference window, suitable for supersmall screens
• Cache downloaded json and only retrieve them when changed @mattiabertorello
• Suspend serial monitor if the board gets disconnected abruptly
• Libraries can now declare dependencies that will be proposed during lib installation
• SerialPlotter: allow adding labels @chromhelm
• Support tar.xz archives for Board Manager @vowstar
• SerialMonitor: add command history (via arrow keys) @Pieter12345
• Accessibility: add checkbox to enable accessibility in Preferences @joew46167
  This mode enables a plethora of improvements on voiceover and keyboard navigation.
  eg. links become accessible buttons, lists are scrollable via arrow keys without much pain

wifi-updater

• Add latest NINA firmware

hardware

• Bundle new avr toolchain (fixes lto issue with 5.4.0 and 64bit compatibility with upcoming macOS Catalina)

arduino-builder

• updated arduino-builder to 1.4.7 (based on the new arduino-cli)