Fetch the title of every page on Wikipedia.

Steps:

• Install NodeJS Latest LTS Version: 10.*.* (includes npm 6.*.*): https://nodejs.org/en/download/
• npm run mediawiki for https://www.mediawiki.org (about 5 min).
• npm run wikipedia for https://en.wikipedia.org (about 5 hours).
• npm run dev for fast test.