docs: Bump version to 1.3.8.
docs: Bump version to 1.3.8.

Should have done it before tagging...

ceramos/micropython,tralamazza/micropython,xuxiaoxin/micropython,EcmaXp/micropython,stonegithubs/micropython,skybird6672/micropython,ericsnowcurrently/micropython,jimkmc/micropython,feilongfl/micropython,bvernoux/micropython,dinau/micropython,noahwilliamsson/micropython,MrSurly/micropython,ChuckM/micropython,dxxb/micropython,adamkh/micropython,HenrikSolver/micropython,HenrikSolver/micropython,supergis/micropython,ganshun666/micropython,paul-xxx/micropython,HenrikSolver/micropython,adafruit/circuitpython,jmarcelino/pycom-micropython,MrSurly/micropython,misterdanb/micropython,rubencabrera/micropython,warner83/micropython,suda/micropython,pozetroninc/micropython,dhylands/micropython,vitiral/micropython,martinribelotta/micropython,hosaka/micropython,cwyark/micropython,henriknelson/micropython,Timmenem/micropython,ryannathans/micropython,jlillest/micropython,warner83/micropython,KISSMonX/micropython,tobbad/micropython,puuu/micropython,adafruit/micropython,oopy/micropython,misterdanb/micropython,ericsnowcurrently/micropython,cloudformdesign/micropython,dmazzella/micropython,ceramos/micropython,firstval/micropython,dxxb/micropython,Timmenem/micropython,warner83/micropython,orionrobots/micropython,jmarcelino/pycom-micropython,TDAbboud/micropython,xyb/micropython,MrSurly/micropython,SungEun-Steve-Kim/test-mp,redbear/micropython,galenhz/micropython,matthewelse/micropython,dhylands/micropython,ernesto-g/micropython,xyb/micropython,ryannathans/micropython,redbear/micropython,selste/micropython,ChuckM/micropython,toolmacher/micropython,PappaPeppar/micropython,pozetroninc/micropython,trezor/micropython,vitiral/micropython,danicampora/micropython,xhat/micropython,mpalomer/micropython,hiway/micropython,firstval/micropython,adamkh/micropython,skybird6672/micropython,vriera/micropython,jimkmc/micropython,ernesto-g/micropython,noahchense/micropython,puuu/micropython,adafruit/circuitpython,hiway/micropython,hiway/micropython,infinnovation/micropython,ceramos/micropython,adafruit/circuitpython,lowRISC/micropython,hiway/micropython,danicampora/micropython,mianos/micropython,martinribelotta/micropython,omtinez/micropython,drrk/micropython,kerneltask/micropython,lowRISC/micropython,SungEun-Steve-Kim/test-mp,tobbad/micropython,galenhz/micropython,blmorris/micropython,neilh10/micropython,chrisdearman/micropython,cwyark/micropython,KISSMonX/micropython,alex-robbins/micropython,toolmacher/micropython,infinnovation/micropython,firstval/micropython,dhylands/micropython,alex-march/micropython,AriZuu/micropython,adafruit/circuitpython,cnoviello/micropython,Vogtinator/micropython,blazewicz/micropython,lbattraw/micropython,paul-xxx/micropython,SHA2017-badge/micropython-esp32,mpalomer/micropython,jimkmc/micropython,tobbad/micropython,noahchense/micropython,suda/micropython,tobbad/micropython,EcmaXp/micropython,ernesto-g/micropython,alex-march/micropython,tdautc19841202/micropython,feilongfl/micropython,alex-robbins/micropython,deshipu/micropython,aethaniel/micropython,SHA2017-badge/micropython-esp32,PappaPeppar/micropython,praemdonck/micropython,warner83/micropython,mianos/micropython,Peetz0r/micropython-esp32,misterdanb/micropython,puuu/micropython,dxxb/micropython,adafruit/circuitpython,skybird6672/micropython,KISSMonX/micropython,xuxiaoxin/micropython,henriknelson/micropython,neilh10/micropython,martinribelotta/micropython,cnoviello/micropython,dmazzella/micropython,toolmacher/micropython,dinau/micropython,vitiral/micropython,ryannathans/micropython,TDAbboud/micropython,bvernoux/micropython,paul-xxx/micropython,jimkmc/micropython,alex-robbins/micropython,noahchense/micropython,pramasoul/micropython,ruffy91/micropython,aethaniel/micropython,selste/micropython,Timmenem/micropython,KISSMonX/micropython,ryannathans/micropython,kerneltask/micropython,mhoffma/micropython,Peetz0r/micropython-esp32,tuc-osg/micropython,stonegithubs/micropython,tuc-osg/micropython,supergis/micropython,emfcamp/micropython,danicampora/micropython,dxxb/micropython,tuc-osg/micropython,vriera/micropython,bvernoux/micropython,pramasoul/micropython,dmazzella/micropython,rubencabrera/micropython,kostyll/micropython,PappaPeppar/micropython,swegener/micropython,mpalomer/micropython,noahwilliamsson/micropython,pozetroninc/micropython,ruffy91/micropython,heisewangluo/micropython,alex-robbins/micropython,stonegithubs/micropython,kostyll/micropython,ericsnowcurrently/micropython,cwyark/micropython,deshipu/micropython,suda/micropython,utopiaprince/micropython,noahchense/micropython,suda/micropython,omtinez/micropython,blmorris/micropython,rubencabrera/micropython,adafruit/micropython,deshipu/micropython,warner83/micropython,bvernoux/micropython,ChuckM/micropython,swegener/micropython,slzatz/micropython,danicampora/micropython,SHA2017-badge/micropython-esp32,deshipu/micropython,slzatz/micropython,kerneltask/micropython,mianos/micropython,hosaka/micropython,adamkh/micropython,mianos/micropython,PappaPeppar/micropython,blazewicz/micropython,tdautc19841202/micropython,EcmaXp/micropython,selste/micropython,cnoviello/micropython,stonegithubs/micropython,neilh10/micropython,tuc-osg/micropython,praemdonck/micropython,infinnovation/micropython,martinribelotta/micropython,kostyll/micropython,HenrikSolver/micropython,supergis/micropython,jmarcelino/pycom-micropython,mianos/micropython,henriknelson/micropython,adafruit/circuitpython,orionrobots/micropython,SHA2017-badge/micropython-esp32,orionrobots/micropython,orionrobots/micropython,praemdonck/micropython,bvernoux/micropython,jmarcelino/pycom-micropython,mhoffma/micropython,cnoviello/micropython,pfalcon/micropython,PappaPeppar/micropython,micropython/micropython-esp32,jimkmc/micropython,ruffy91/micropython,mhoffma/micropython,alex-march/micropython,tdautc19841202/micropython,cloudformdesign/micropython,Timmenem/micropython,Peetz0r/micropython-esp32,mpalomer/micropython,emfcamp/micropython,blmorris/micropython,tobbad/micropython,hiway/micropython,TDAbboud/micropython,blazewicz/micropython,vitiral/micropython,swegener/micropython,adafruit/micropython,omtinez/micropython,lowRISC/micropython,oopy/micropython,puuu/micropython,oopy/micropython,HenrikSolver/micropython,aethaniel/micropython,trezor/micropython,turbinenreiter/micropython,aethaniel/micropython,xuxiaoxin/micropython,supergis/micropython,misterdanb/micropython,matthewelse/micropython,MrSurly/micropython-esp32,cwyark/micropython,xhat/micropython,ahotam/micropython,dinau/micropython,utopiaprince/micropython,ChuckM/micropython,matthewelse/micropython,orionrobots/micropython,rubencabrera/micropython,utopiaprince/micropython,pfalcon/micropython,alex-march/micropython,Peetz0r/micropython-esp32,cnoviello/micropython,turbinenreiter/micropython,heisewangluo/micropython,ernesto-g/micropython,pfalcon/micropython,tralamazza/micropython,slzatz/micropython,selste/micropython,noahchense/micropython,toolmacher/micropython,tralamazza/micropython,stonegithubs/micropython,cwyark/micropython,pozetroninc/micropython,micropython/micropython-esp32,pfalcon/micropython,ganshun666/micropython,xuxiaoxin/micropython,xuxiaoxin/micropython,kostyll/micropython,MrSurly/micropython-esp32,swegener/micropython,matthewelse/micropython,heisewangluo/micropython,tdautc19841202/micropython,jmarcelino/pycom-micropython,oopy/micropython,lowRISC/micropython,redbear/micropython,drrk/micropython,AriZuu/micropython,deshipu/micropython,pramasoul/micropython,firstval/micropython,mgyenik/micropython,paul-xxx/micropython,heisewangluo/micropython,hosaka/micropython,dhylands/micropython,mhoffma/micropython,lbattraw/micropython,dmazzella/micropython,cloudformdesign/micropython,pramasoul/micropython,SHA2017-badge/micropython-esp32,jlillest/micropython,martinribelotta/micropython,turbinenreiter/micropython,tdautc19841202/micropython,tuc-osg/micropython,noahwilliamsson/micropython,micropython/micropython-esp32,adamkh/micropython,lbattraw/micropython,MrSurly/micropython-esp32,henriknelson/micropython,EcmaXp/micropython,ChuckM/micropython,cloudformdesign/micropython,neilh10/micropython,swegener/micropython,adafruit/micropython,alex-march/micropython,vriera/micropython,xyb/micropython,praemdonck/micropython,misterdanb/micropython,ericsnowcurrently/micropython,vitiral/micropython,utopiaprince/micropython,mhoffma/micropython,ganshun666/micropython,kerneltask/micropython,feilongfl/micropython,MrSurly/micropython-esp32,aethaniel/micropython,skybird6672/micropython,emfcamp/micropython,feilongfl/micropython,Vogtinator/micropython,utopiaprince/micropython,feilongfl/micropython,slzatz/micropython,omtinez/micropython,MrSurly/micropython,torwag/micropython,emfcamp/micropython,suda/micropython,lbattraw/micropython,lbattraw/micropython,lowRISC/micropython,trezor/micropython,henriknelson/micropython,torwag/micropython,noahwilliamsson/micropython,heisewangluo/micropython,ruffy91/micropython,ganshun666/micropython,SungEun-Steve-Kim/test-mp,ahotam/micropython,torwag/micropython,chrisdearman/micropython,galenhz/micropython,noahwilliamsson/micropython,vriera/micropython,xyb/micropython,blazewicz/micropython,paul-xxx/micropython,selste/micropython,hosaka/micropython,MrSurly/micropython-esp32,KISSMonX/micropython,skybird6672/micropython,ahotam/micropython,mgyenik/micropython,chrisdearman/micropython,alex-robbins/micropython,AriZuu/micropython,chrisdearman/micropython,omtinez/micropython,pozetroninc/micropython,xhat/micropython,matthewelse/micropython,trezor/micropython,danicampora/micropython,SungEun-Steve-Kim/test-mp,Vogtinator/micropython,dinau/micropython,infinnovation/micropython,torwag/micropython,redbear/micropython,kerneltask/micropython,AriZuu/micropython,adafruit/micropython,vriera/micropython,drrk/micropython,TDAbboud/micropython,xyb/micropython,ceramos/micropython,hosaka/micropython,dinau/micropython,adamkh/micropython,ruffy91/micropython,SungEun-Steve-Kim/test-mp,galenhz/micropython,TDAbboud/micropython,kostyll/micropython,jlillest/micropython,dxxb/micropython,chrisdearman/micropython,AriZuu/micropython,toolmacher/micropython,infinnovation/micropython,dhylands/micropython,ceramos/micropython,drrk/micropython,xhat/micropython,micropython/micropython-esp32,turbinenreiter/micropython,pfalcon/micropython,jlillest/micropython,redbear/micropython,mgyenik/micropython,tralamazza/micropython,Vogtinator/micropython,pramasoul/micropython,blazewicz/micropython,praemdonck/micropython,drrk/micropython,mgyenik/micropython,oopy/micropython,Peetz0r/micropython-esp32,mgyenik/micropython,mpalomer/micropython,slzatz/micropython,blmorris/micropython,xhat/micropython,Vogtinator/micropython,puuu/micropython,ahotam/micropython,blmorris/micropython,ericsnowcurrently/micropython,neilh10/micropython,jlillest/micropython,ahotam/micropython,galenhz/micropython,rubencabrera/micropython,EcmaXp/micropython,Timmenem/micropython,ryannathans/micropython,ganshun666/micropython,ernesto-g/micropython,supergis/micropython,matthewelse/micropython,emfcamp/micropython,torwag/micropython,firstval/micropython,MrSurly/micropython,micropython/micropython-esp32,trezor/micropython,cloudformdesign/micropython,turbinenreiter/micropython