Added PyPy3 testing
Added PyPy3 testing

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