Support for passing browser options to pyppeteer

[tverona1]

[temach]

This is really useful, also faced the same issue when I wanted to pass executablePath argument when running in docker container.

Would love to see this merged.

In my case I decided to monkey patch over the original library:

from requests_html import BaseSession, HTMLSession
import asyncio
import pyppeteer


class MyBaseSession(BaseSession):
    def __init__(self, *args, **kwargs):
        super(MyBaseSession, self).__init__(*args, **kwargs)

    @property
    async def browser(self):
        if not hasattr(self, "_browser"):
            # override browser args to pass default chromium location
            self._browser = await pyppeteer.launch(executablePath="/usr/bin/chromium", ignoreHTTPSErrors=not(self.verify), headless=True, args=['--no-sandbox'])
        return self._browser


# multiple inheritance: due to how super() works
# property "browser" is searched for in HTMLSession then instead of going to BaseSession.browser as normal
# it goes to MyBaseSession where we have it overriden to pass custom pyppeteer args
class MyHTMLSession(HTMLSession, MyBaseSession):
    def __init__(self, **kwargs):
        super(MyHTMLSession, self).__init__(**kwargs)