LICENSE: Update year range in top-level license.
LICENSE: Update year range in top-level license.

bvernoux/micropython,MrSurly/micropython,adafruit/circuitpython,trezor/micropython,pozetroninc/micropython,bvernoux/micropython,tobbad/micropython,tobbad/micropython,henriknelson/micropython,selste/micropython,trezor/micropython,selste/micropython,tobbad/micropython,henriknelson/micropython,tobbad/micropython,adafruit/circuitpython,pramasoul/micropython,pozetroninc/micropython,bvernoux/micropython,MrSurly/micropython,bvernoux/micropython,adafruit/circuitpython,pramasoul/micropython,pozetroninc/micropython,kerneltask/micropython,kerneltask/micropython,pozetroninc/micropython,selste/micropython,pfalcon/micropython,pramasoul/micropython,pozetroninc/micropython,selste/micropython,adafruit/circuitpython,bvernoux/micropython,pramasoul/micropython,pramasoul/micropython,trezor/micropython,MrSurly/micropython,pfalcon/micropython,adafruit/circuitpython,henriknelson/micropython,henriknelson/micropython,pfalcon/micropython,trezor/micropython,henriknelson/micropython,selste/micropython,pfalcon/micropython,MrSurly/micropython,MrSurly/micropython,kerneltask/micropython,kerneltask/micropython,trezor/micropython,kerneltask/micropython,pfalcon/micropython,adafruit/circuitpython,tobbad/micropython