Match the console version of the library to the docs

[kossnocorp]

See the original issue: date-fns/date-fns#887

Minor thing, but a lot of times when I'm looking for a particular feature in a JS library, I'll go to the docs and try it out in the console. However the version of date-fns doesn't switch when you switch the documentation version, so what you're trying out in the browser console doesn't line up with what you're viewing in the docs.

[kimroen]

This was very jarring to me as I was trying out the formatting functions that changed dramatically in version 2 using a pre-2 version in the console.