v0.2.0a1

• Support series 6 of ipykernel as well a 5
• Back to previously supported synchronous insterface
• Async interface is also available

to use new async interface use async with or async for

async with ui_events() as ui_poll:
    do_stuff()
    await ui_poll()

async for x in with_ui_events(its):
    do_stuff_with(x)