Upgrade win-detect-browsers to v2

[dtanp]

Firefox isn't detected on Windows 10. Upgrade to use win-detect-browsers v2 and the issue is fixed.

Reproduce steps:

• Install Firefox latest (v60)
• Run /example/detect.js
• Only chrome and ie show in console.

Solution:

Try to upgrade win-detect-browsers module to v2 and run the detect.js again, Firefox will show in the list.

@mitchhentges Would it be possible to use the new version of web-detect-browsers instead?

[mitchhentges]

win-detect-browsers 2 is out? Nice!

I'm a little knee-deep in other commitments right now to work on this, but a PR would be welcome!

[dtanp]

@mitchhentges Cool. I've just created the PR. Please help to review when you are free :)

Many thanks in advance!