+imagemagick@6 (444/548)

[mfts]

Formulae: https://formulae.brew.sh/formula/imagemagick@6

[mxcl]

Separate distributable location so we either have to do like we did with yarn or adapt what is possible with brewkit.

Ideally I think we adapt brewkit to handle this better as I don't want more instances like yarn where it is considered a conflict to run yarn even though they provide different versions and thus should just be differentiated by version.