Re-added pypy3 testing
Re-added pypy3 testing

jirenz/CS229_Project,pieiscool/edited-hearthbreaker,slaymaker1907/hearthbreaker,danielyule/hearthbreaker,anuragpapineni/Hearthbreaker-evolved-agent,anuragpapineni/Hearthbreaker-evolved-agent,pieiscool/edited-hearthbreaker,anuragpapineni/Hearthbreaker-evolved-agent,Ragowit/hearthbreaker,kingoflolz/hearthbreaker,slaymaker1907/hearthbreaker,noa/hearthbreaker