Bug | Highlighting might not clear after disposal

[HaimCandiTech]

In rare cases where there was a change in monaco's content after disposal of highlightOnDidChangeModelContent
The highlight might stay there

Steps to reproduce:

1. Set up monaco with JSX highlight library
2. Register to highlightOnDidChangeModelContent
3. Update monaco value (change from <></> to <div></div>
4. Immediately call highlightOnDidChangeModelContent's dispose function

Expected Result:
No highlight

Result:
Incorrect highlight will be shown for the name of the JSX element

How to fix:
Add clearTimeout(tid); as the first line of:

syntax-highlighter/src/core/MonacoJSXHighlighter.js

Lines 230 to 242 in 28984b6

	const onDispose = () => {
	this.decoratorMapper.reset();
	if (
	!_isHighlightBoundToModelContentChanges
	) {
	return;
	}
	_isHighlightBoundToModelContentChanges = false;
	highlighterDisposer && highlighterDisposer.dispose();
	highlighterDisposer = null;
	}

[luminaxster]

Thank you so much, I will fix this and #22 next weekend.