Fix Incorrect Module Reference for TypeScriptHighlightRules

[baguskah]

Issue #, if available: #5498

Description of changes:

It appear that this PR provides an incorrect module reference

var TypeScriptHighlightRules = require("./javascript_highlight_rules").TypeScriptHighlightRules;

This should actually reference ./typescript_highlight_rules. As a result, when attempting to access TypeScriptHighlightRules in tsx_highlight_rules, it returns undefined.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.64%. Comparing base (e59ae67) to head (b60efb5).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5531      +/-   ##
==========================================
+ Coverage   86.61%   86.64%   +0.02%     
==========================================
  Files         591      593       +2     
  Lines       42732    42839     +107     
  Branches     7102     7120      +18     
==========================================
+ Hits        37012    37117     +105     
- Misses       5720     5722       +2     

Flag	Coverage Δ
unittests	86.64% <ø> (+0.02%)	⬆️

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[nightwing]

Thank you!