Add isNaN to the globals

[JonnyBurger]

Make isNaN available inside a worklet.

[terrysahaidak]

Just a little note: it's better to use safer version Number.isNaN

[jakub-gonet]

What with other things defined as globals?

In particular:

• NaN
• Infinity
• arguments

and all functions listed under "Function properties".

[kmagiera]

merging this one, it appears however that we should work on changing this logic to something more comprahensive. i.e. getting the list from globals directly via Object.getOwnPropertyNames(global) (will need to filter out some of the props as plugin runs on a node environment and exports globally things like os, net, http modules)