modbuiltins: round(): Accept second arg, and at least support it to be 0.
modbuiltins: round(): Accept second arg, and at least support it to be 0.

Per https://docs.python.org/3/library/functions.html#round, 2-args format
guaranteedly returns float.

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