[IMPROV] chars tests: Check Unicode version
[IMPROV] chars tests: Check Unicode version

Instead of just checking if Python 2 or Python 3 it's checking if the Unicode
version is below 6.3 when U+180e was in the category Zs.

Change-Id: I74b65977f2774b17c7d78d5ae8a27bed6bbf8684

happy5214/pywikibot-core,trishnaguha/pywikibot-core,valhallasw/pywikibot-core,happy5214/pywikibot-core,magul/pywikibot-core,wikimedia/pywikibot-core,icyflame/batman,magul/pywikibot-core,hasteur/g13bot_tools_new,jayvdb/pywikibot-core,h4ck3rm1k3/pywikibot-core,smalyshev/pywikibot-core,Darkdadaah/pywikibot-core,jayvdb/pywikibot-core,Darkdadaah/pywikibot-core,VcamX/pywikibot-core,emijrp/pywikibot-core,hasteur/g13bot_tools_new,h4ck3rm1k3/pywikibot-core,hasteur/g13bot_tools_new,wikimedia/pywikibot-core,darthbhyrava/pywikibot-local,npdoty/pywikibot,xZise/pywikibot-core,TridevGuha/pywikibot-core,PersianWikipedia/pywikibot-core,npdoty/pywikibot