v1.9.0

• [f4345f2] add useRect hook to observe an elements size and position
• [18f2eae] add useViewportEffect, useScrollEffect, useDimensionsEffect and useRectEffect handler to perform side effects without updating the component
• [d06e889] fix a bug where non idle listeners were informed for idle events, which resulted in unnessesary events
• [7d749e8] deprecate ObserveBoundingClientRect as it has bad performance and can in most situations be replaced with the useRect hook.