added mock to the requirements
added mock to the requirements

edwardpark/pyNES,imanmafi/pyNES,bradparks/pyNES__python_8bit_nes_games_nintendo,jmgaya/pyNES,jay-johnson/pyNES,Gybes/pyNES,JohnKossa/pyNES,fufufanatic/pyNES,DaTrollMon/pyNES,arabenjamin/pyNES,Militree/pyNES,stellatigre/pyNES,kod3r/pyNES,gutomaia/pyNES,ftick/pyNES,GrimDerp/pyNES,NickDeckerDevs/pyNES,bigpete/pyNES,BmanisKing/Mine,sperez4mba/pyNES,shekkbuilder/pyNES,MSylvia/pyNES,kubov/pyNES,silky/pyNES,AsSheng/pyNES,tekromancr/pyNES,danielserva/pyNES,shaunstanislaus/pyNES