NOTE for users of ESP8266 boards  (e.g. NodeMCU and d1 mini):
The pin numbers have been changed to match the D0-D8 labels on most boards, making them easier to use. Previous versions of MicroBlocks used the GPIO pin numbers used in the Arduino ESP8266 package. If you use ESP8266 boards, you may need to update your pin numbers.

NOTE for Mac users:
The signed Mac app now supports ESP board firmware installation, so there is no longer any need for an unsigned version.

System
* make digital pin numbers match D0-D8 labels on most ESP8266 boards (e.g NodeMCU and d1 mini)
* replace esptool.py with built-in support for esptool protocol
* preliminary support for the Teensy 3.1, 3.2, 4.1, and 4.2 (thanks, Paul!)

Libraries
* Updated Finch library (thanks, Tom!)

Translations
* Updated German and Dutch translations (thanks, Tom!)

Bug Fixes
* Fix: Problem installing firmware on the Circuit Playground Bluefruit
* Fix: Problem installing firmware on AdaFruit Clue