docs/library/machine.Pin: Update pin docs to reflect ESP8266 support.
docs/library/machine.Pin: Update pin docs to reflect ESP8266 support.

adafruit/circuitpython,hiway/micropython,tobbad/micropython,mhoffma/micropython,TDAbboud/micropython,MrSurly/micropython,oopy/micropython,Timmenem/micropython,hosaka/micropython,AriZuu/micropython,HenrikSolver/micropython,turbinenreiter/micropython,bvernoux/micropython,lowRISC/micropython,tralamazza/micropython,mhoffma/micropython,oopy/micropython,Timmenem/micropython,redbear/micropython,dinau/micropython,jmarcelino/pycom-micropython,pozetroninc/micropython,hiway/micropython,trezor/micropython,alex-march/micropython,torwag/micropython,praemdonck/micropython,adafruit/micropython,PappaPeppar/micropython,ryannathans/micropython,tralamazza/micropython,tralamazza/micropython,tobbad/micropython,tobbad/micropython,hosaka/micropython,dmazzella/micropython,drrk/micropython,cwyark/micropython,dinau/micropython,pfalcon/micropython,HenrikSolver/micropython,emfcamp/micropython,toolmacher/micropython,ganshun666/micropython,pozetroninc/micropython,dxxb/micropython,matthewelse/micropython,turbinenreiter/micropython,tralamazza/micropython,blazewicz/micropython,pramasoul/micropython,deshipu/micropython,deshipu/micropython,misterdanb/micropython,TDAbboud/micropython,hiway/micropython,SHA2017-badge/micropython-esp32,adafruit/circuitpython,infinnovation/micropython,dmazzella/micropython,pfalcon/micropython,SHA2017-badge/micropython-esp32,ryannathans/micropython,puuu/micropython,deshipu/micropython,puuu/micropython,matthewelse/micropython,chrisdearman/micropython,dxxb/micropython,alex-robbins/micropython,MrSurly/micropython-esp32,tobbad/micropython,kerneltask/micropython,Timmenem/micropython,trezor/micropython,selste/micropython,dmazzella/micropython,SHA2017-badge/micropython-esp32,MrSurly/micropython-esp32,selste/micropython,kerneltask/micropython,MrSurly/micropython,alex-robbins/micropython,hosaka/micropython,Peetz0r/micropython-esp32,blazewicz/micropython,dxxb/micropython,turbinenreiter/micropython,dinau/micropython,AriZuu/micropython,blazewicz/micropython,MrSurly/micropython-esp32,TDAbboud/micropython,pramasoul/micropython,deshipu/micropython,blazewicz/micropython,drrk/micropython,alex-march/micropython,misterdanb/micropython,pramasoul/micropython,pozetroninc/micropython,ganshun666/micropython,pozetroninc/micropython,mpalomer/micropython,emfcamp/micropython,dinau/micropython,redbear/micropython,bvernoux/micropython,micropython/micropython-esp32,turbinenreiter/micropython,ryannathans/micropython,lowRISC/micropython,tuc-osg/micropython,adafruit/circuitpython,lowRISC/micropython,tuc-osg/micropython,MrSurly/micropython,bvernoux/micropython,emfcamp/micropython,henriknelson/micropython,redbear/micropython,pozetroninc/micropython,HenrikSolver/micropython,mpalomer/micropython,praemdonck/micropython,chrisdearman/micropython,alex-robbins/micropython,selste/micropython,MrSurly/micropython,matthewelse/micropython,cwyark/micropython,adafruit/circuitpython,chrisdearman/micropython,adafruit/circuitpython,mpalomer/micropython,HenrikSolver/micropython,PappaPeppar/micropython,lowRISC/micropython,dinau/micropython,cwyark/micropython,trezor/micropython,AriZuu/micropython,swegener/micropython,oopy/micropython,infinnovation/micropython,alex-robbins/micropython,drrk/micropython,mhoffma/micropython,mpalomer/micropython,hiway/micropython,puuu/micropython,ryannathans/micropython,alex-march/micropython,blazewicz/micropython,alex-robbins/micropython,pfalcon/micropython,torwag/micropython,kerneltask/micropython,misterdanb/micropython,henriknelson/micropython,swegener/micropython,deshipu/micropython,PappaPeppar/micropython,PappaPeppar/micropython,turbinenreiter/micropython,henriknelson/micropython,micropython/micropython-esp32,chrisdearman/micropython,pfalcon/micropython,puuu/micropython,Timmenem/micropython,selste/micropython,ganshun666/micropython,TDAbboud/micropython,cwyark/micropython,torwag/micropython,toolmacher/micropython,lowRISC/micropython,oopy/micropython,AriZuu/micropython,hosaka/micropython,drrk/micropython,praemdonck/micropython,adafruit/circuitpython,alex-march/micropython,chrisdearman/micropython,jmarcelino/pycom-micropython,SHA2017-badge/micropython-esp32,praemdonck/micropython,AriZuu/micropython,jmarcelino/pycom-micropython,Peetz0r/micropython-esp32,Peetz0r/micropython-esp32,MrSurly/micropython-esp32,adafruit/micropython,mhoffma/micropython,Timmenem/micropython,bvernoux/micropython,ganshun666/micropython,infinnovation/micropython,Peetz0r/micropython-esp32,ganshun666/micropython,toolmacher/micropython,henriknelson/micropython,alex-march/micropython,redbear/micropython,MrSurly/micropython,mpalomer/micropython,emfcamp/micropython,jmarcelino/pycom-micropython,Peetz0r/micropython-esp32,torwag/micropython,pramasoul/micropython,ryannathans/micropython,matthewelse/micropython,kerneltask/micropython,adafruit/micropython,matthewelse/micropython,pfalcon/micropython,cwyark/micropython,micropython/micropython-esp32,swegener/micropython,HenrikSolver/micropython,kerneltask/micropython,mhoffma/micropython,bvernoux/micropython,dxxb/micropython,praemdonck/micropython,trezor/micropython,adafruit/micropython,toolmacher/micropython,hiway/micropython,dxxb/micropython,matthewelse/micropython,adafruit/micropython,selste/micropython,trezor/micropython,misterdanb/micropython,swegener/micropython,hosaka/micropython,SHA2017-badge/micropython-esp32,pramasoul/micropython,infinnovation/micropython,tuc-osg/micropython,tuc-osg/micropython,TDAbboud/micropython,jmarcelino/pycom-micropython,PappaPeppar/micropython,emfcamp/micropython,swegener/micropython,redbear/micropython,oopy/micropython,henriknelson/micropython,MrSurly/micropython-esp32,drrk/micropython,micropython/micropython-esp32,torwag/micropython,misterdanb/micropython,puuu/micropython,micropython/micropython-esp32,dmazzella/micropython,toolmacher/micropython,tuc-osg/micropython,tobbad/micropython,infinnovation/micropython