self.cross_projects is moved to family.WikimediaFamily class; update language_by_size
self.cross_projects is moved to family.WikimediaFamily class;
update language_by_size

https://mediawiki.org/wiki/Special:Code/pywikipedia/11037

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