[julia] Update keywords, built_in and literals for julia 1.X.

[fredrikekre]

Changes

This updates the lists of keyword, built_in and literal for Julia 1.X. Julia 1.X was released over 2 years ago so (IMO) it should be safe to remove the old tokens that are not applicable any more, but I don't know what your policy is for such things.

Checklist

• Tests: I did not find any tests for Julia syntax and adding this is beyond my capabilities (Edit: found this https://github.com/highlightjs/highlight.js/blob/master/test/detect/julia/default.txt so I will update that).
• Updated the changelog at CHANGES.md
• Added myself to AUTHORS.txt, under Contributors

[fredrikekre]

CC @mortenpi @tlienart, you might be interested in this.

[joshgoebel]

Thanks for this! While we're at can we go ahead and move the words into one-word per line arrays to increase the visibility and ease of future maintenance? IE:

const LITERALS = [
   "true",
   "false",
  // one word per line, etc.
]

keywords : {
  literal: LITERALS.join(" "),
  // ...

You can see examples with javascript.js and ecmascript.js...

[joshgoebel]

it should be safe to remove the old tokens that are not applicable any more, but I don't know what your policy is for such things.

We'd usually leave them if there is a chance they're still in use in the world or old code snippets but since these lists are auto-generated I don't mind if we drop the older keywords since as you say it's been quite some time.

[fredrikekre]

Thanks, I updated the PR.

[joshgoebel]

Awesome. Almost there! :-)

[fredrikekre]

Added some new stuff to test/detect, and also noticed that some duplicates where included by my scripts, so fixed that too.

[joshgoebel]

@fredrikekre Thanks so much for contributing!