Improved Haskell and PureScript

[RunDevelopment]

I made changes to PureScript according to #3006. I also made improvements to Haskell all of which trickle down to PureScript.

Haskell changes:

• . is now highlighted as punctuation inside import statements, hvariables, and constants.
• Hvariables and constants can now end with a '. The \b at the end of both patterns previously prevented this.
• I split the operator regex into 3 regexes to make it easier to understand. I also simplified the ASCII operator regex (3).

PureScript changes:

• . is now highlighted as punctuation inside import statements.
• Improved ASCII operators as discussed here.
• Support all UTF16 Unicode operators. This means that all Unicode operators symbols in the BMP are supported. Symbols in the astral planes are not supported because they aren't commonly used and increase the file size by a lot.

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This resolves #3006.

[github-actions]

JS File Size Changes (gzipped)

A total of 2 files have changed, with a combined diff of +684 B (+34.7%).

file	master	pull	size diff	% diff
components/prism-haskell.min.js	1.5 KB	1.53 KB	+25 B	+1.7%
components/prism-purescript.min.js	465 B	1.12 KB	+659 B	+141.7%

Generated by 🚫 dangerJS against 82522b6

[RunDevelopment]

PureScript gains a bit of weight but it's still smaller than Haskell, so it should be alright.

@toastal, this should solve your issue, right?

[toastal]

lgtm 👍