ConfigurableFirmata example doesn’t compile

[FGasper]

ConfigurableFirmata.ino fails to compile because it seems to expect a Wire library that defines TwoWire.end(), but esp8266’s versions doesn’t have it.

I note that esp32’s Arduino library includes it, though: https://github.com/espressif/arduino-esp32/blob/master/libraries/Wire/src/Wire.h

Is it possible to update esp8266?