Syntax highlighting for punctuations, null and undefined.

[tinganho]

There is currently no syntax high-lightning for the following punctuations:

!=
==
!==
===
!
?
:

and more... But the above are some of those I expect to have syntax high-lightning.

Also null and undefined are missing syntax high-lightning:

null 
undefined

[basarat]

I made it high priority to double check. But after checking there is some syntax highlighting for these compare ts and js:

Marking this as a duplicate of #71 which is tracking advanced highlighting desires 🌹