docs(api.md): added page.click + waitForNavigation example (#1792)
docs(api.md): added page.click + waitForNavigation example (#1792)

Fixes #1421.
GoogleChrome/puppeteer,GoogleChrome/puppeteer,puppeteer/puppeteer,puppeteer/puppeteer,puppeteer/puppeteer,puppeteer/puppeteer,GoogleChrome/puppeteer