Test in Safari ≤ 4.1.3

[mathiasbynens]

If anyone has access to such an old Safari version (I don’t), I’d appreciate it if you could clone this repo, run npm install, npm install http-server -g; npm test, open the test pages in it, and report back the results.

Once that happens, the README can be updated accordingly.

[mgol]

I've tried via BrowserStack on Safari 4.0.5 on Snow Leopard. The Quirks Mode tests all succeede, the standards mode had one flakey failure; restarting the page fixed it.