... and doesn't work with Java 16 or later versions (see issue #4106).
This PR is a duplicate of #4134: I wasn't sure whether I should edit `docs` or `versioned_docs`, so edited both.
With Homebrew 2.6.0:
> All brew cask commands have been deprecated in favour of brew commands (with --cask) when necessary.
See https://brew.sh/2020/12/01/homebrew-2.6.0/.
Also, removed mention of openrefine-dev cask as this facility does not appear to be in use.
* Take snapshot of docs for version 3.4
* Versioning for docs of the cross function, for #2504
* Document 'Store archive file' option (#1963)
* Remove unsupported preference from 3.4 docs (#2624)
* Mention that forEach works on JSON objects (#3149)
* Remove wholeText from 3.4 docs (#3180)
* Document -H, /H CLI options (#3288)
* Migrate Wikibase documentation from Wikidata (#1640)
* Miscellanous, copy-editing
