extmod/uzlib/: Update uzlib to v2.0.3.
extmod/uzlib/: Update uzlib to v2.0.3.

Fixes for more pedantic warnings.

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