`noHighlightRe` should win out over `languageDetectRe`

If a class name matches `noHighlightRe` it should always be ignored - even if it otherwise looks correct and is also a match of `languageDetectRe`... this would allow you to use `lang-*` as your detect match but then also have an exclude list in the `noHightlightRe` regex.

IE, the block list overrides the allow list. This is an edge case. If no one steps up to work on this before v12 this will auto-close as it's such a small edge case (and also a breaking change).

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**Is your request related to a specific problem you're having?**
I am using highlight.js to with "hljs.highlightAll()", and get these warnings.

**The solution you'd prefer / feature you'd like to see added...**
an option like: excluded-languages: {mermaid, ...}
or an option to disable these warnings.