Add new argument 'driver_arguments' to specify arguments in webdriver

[steevensmelo]

I added the argument "driver_arguments" to the relevant Python functions to specify the arguments in the driver. I send the flags of the driver as follows:

chart.save('test.png', scale_factor = 2.0, driver_arguments = ['--no-sandbox'])

I hope you can check the code.

Thanks a lot.

Fixes #68

[joelostblom]

Thanks for you PR @steevensmelo . As you have noticed, there hasn't been any development in this repo for a while. Since Altair 5.2, the functionality of Altair Saver is now available in Altair via the vl-convert package. Most of the functionality has been available since 5.0, and the main addition in 5.2 was PDF export. See the docs on how to save charts for more details.

We are going to archive this repo, so I'm closing all the open issues and PRs before doing so. Try out the new options for saving charts mentioned above and if you run into issues, please open an issue directly in the altair or vl-convert repo.