fix async keyword and comment inside destructuring

[arch-mage]

I think async keyword should be an optional part of
a function. So, I remove async from class and object
method type and move it to be an optional part in
function regex. This is related to #598.

And I add jsComment to jsDestructuringBlock and
jsDestructuringArray.

[amadeus]

First off, thanks for taking the time and opening this PR!

However I think I'd like to rehaul how this is done to be more inline with how the rest of the file works. We tend to abuse the shit out of nextgroup and skipwhite, and skipempty. This means you'd need to probably create a few new specific contained async matches and then nextgroup them. I can work on this over the next few days if what I am saying doesn't make sense.

[arch-mage]

Sorry If I can't understand what you're saying well (my english is not that good). By the way, what I can understand is that inserting optional async part into jsFuncName regex doesn't match the current project (maybe leading to spaghetti code 😄 ). I agree.
Any way, my Idea is to make async as an optional part of function declaration (it can only appear exactly before func declaration). That way, it won't messed up with async module that already popular. And now, the only way I can think of is to wrap function declaration into a single region. That's only my idea. I don't know if there will be any drawbacks, because I'm not that good at vim scripting.
Maybe this should be closed then?

[amadeus]

No worries, I get what you are saying, and you understood generally what I meant! I'll close this and start looking at a fix shortly.