implement press and hold interaction for KeyboardDragListener, new updatePosition function, add options for initial delay and interval, see https://github.com/phetsims/coulombs-law/issues/35 and https://github.com/phetsims/scenery/issues/716
implement press and hold interaction for KeyboardDragListener, new updatePosition function, add options for initial delay and interval, see https://github.com/phetsims/coulombs-law/issues/35 and https://github.com/phetsims/scenery/issues/716

phetsims/scenery,phetsims/scenery,phetsims/scenery