Class page must be an inheritance of AsyncIOEventEmitter instead base EventEmitter class to use method page.on's callback in coroutine

[artyl]

Starting with pyee ver 8.x.x default class EventEmitter lost ability to run coroutines using asyncio.ensure_future
This functionality in pyee provided by special class - AsyncIOEventEmitter (see help(pyee.AsyncIOEventEmitter))

So code that uses asyncio.ensure_future would throw error with pyee version >=8.0.0

Latest pyppeteer (pyppeteer-0.2.5) code has dependencies pyee (>=8.1.0,<9.0.0)

How to reproduce problem:

import asyncio
from pyppeteer import launch

async def response_worker(response):
    print(f'response:{response.request.url}')

async def main():
    browser = await launch()
    page = await browser.newPage()
    page.on("response", response_worker)
    await page.goto('https://example.com')
    await asyncio.sleep(3)
    await browser.close()

asyncio.run(main())

pyee <8.0.0 works properly, response_worker will be called

response:https://example.com/

pyee >= 8.0.0 gives warning, response_worker will not be called

pyee/_base.py:81: RuntimeWarning: coroutine 'response_worker' was never awaited
f(*args, **kwargs)
RuntimeWarning: Enable tracemalloc to get the object allocation traceback

[artyl]

the pyppeteer.browser.Browser class seems to have a similar problem with method browser.on("disconnected", ...)
and must be AsyncIOEventEmitter

[PPX47]

Thanks for this! Waiting for merge!