Describe the bug
Readme does not document the known working versions of highlightjs.

Implications of this is that it is not clear that highlight.js 11.3.1 does not work with highlightjs-line-numbers.js 2.6.0

From looking at the demo https://wcoder.github.io/highlightjs-line-numbers.js/ it looks like highlightjs-line-numbers.js 2.6.0 works with highlight.js 8.6

Additional context
Add any other context about the problem here.

hljs.initHighlightingOnLoad();  // Deprecated as of 10.6.0. initHighlightingOnLoad() deprecated.  Use highlightAll()