Cater for cases when puppeteer driver args is a string only

[m90]

This is a fixup for #252

It seems that when passing multiple values through the CLI like:

mochify --driver-options.args='--allow-chrome-as-root' --driver-options.args='--no-sandbox'

yargs will pass ['-allow-chrome-as-root', '--no-sandbox'] when passing a single value like

mochify --driver-options.args='--allow-chrome-as-root'

will yield the plain string '--allow-chrome-as-root'

[m90]

Good news is that including this fix I can run all of my existing Mochify 8 suites just fine using @mochify/cli and the puppeteer driver, both in Docker and unboxed on my local setup.

[mantoni]

📦 Released in @mochify/driver-puppeteer v0.2.2.

[m90]

Nice, this works well for me now when porting an existing mochify setup. Local, local in docker and in CircleCi all run well.