How to set executablePath option

Hi,

I want to specify a custom location with `executablePath`
With pyppeteer  I do 
```
from pyppeteer import launch

browser = await launch(executablePath='<path>')
```
How can I do this with  GerapyPyppeteer?
In general how to set [pyppeteer launch available options](https://miyakogi.github.io/pyppeteer/_modules/pyppeteer/launcher.html#launch)?
