add period property to pulse and sparklepulse, fix typo#123

FoamyGuy merged 1 commit intoadafruit:mainadafruit/Adafruit_CircuitPython_LED_Animation:mainfrom

FoamyGuy:period_property_more_animationsFoamyGuy/Adafruit_CircuitPython_LED_Animation:period_property_more_animationsCopy head branch name to clipboard