Allow passing options directly to Puppeteer's Page.goto() function

[jerboa88]

Remove hardcoded PUPPETEER_WAIT_CONDITION constant and allow options to be passed directly to Puppeteer's Page.goto(), along with other options, like so:

setDefaultOptions({
  puppeteer: {
    goto: {
      timeout: 10000,
      waitUntil: 'networkidle2',
      // ...
    },
    // ...
  },
  // ...
})

Allowing arbitrary options to be passed will give user's more flexibility in case they need to customize the behavior of Page.goto() for their use case.