David Mehren 7ff685933e Lazy-load highlight.js ...

This commit moves the import of highlight.js into a `require.ensure`
block, that is only executed when a code-block is actually present
in a note. Webpack automatically splits the library into a separate
chunk and loads that on demand.

The call to `hljs.listLanguages()` in `index.js` is also replaced
by a static list. This is important, as `index.js` would otherwise
need to import highlight.js, which would cause the quite big
library to be included into nearly every entrypoint, needlessly
increasing the transferred code size.

Signed-off-by: David Mehren <git@herrmehren.de>

2021-06-11 09:29:27 +02:00

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