Disable sharp libvips cache.

[NikolaRHristov]

So, we were able fix a lot of our errors in CompressAstro with sharp namely:

generating optimized images
--
09:09:54.680 | free(): invalid size
09:14:20.856 | Error: Command "npm run build" exited with SIGABRT

and:

munmap_chunk(): invalid pointer

in these issues:

PlayForm/Compress#319
PlayForm/Compress#280

through:

PlayForm/Compress#319 (comment)

and:

PlayForm/Compress#280 (comment)

This PR disables the sharp libvips cache, as it errors when the file is too small and operations are happening too fast (runs into a race condition) - lovell/sharp#3935 (comment)

[changeset-bot]

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Latest commit: ab0ef29

The changes in this PR will be included in the next version bump.

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[ematipico]

Can you add a comment that explains the new line of code?

Having a comment that explains this cache issue would give us a lot of context. Is there - also - an issue you can add to said comment?

One more thing, you'll need to add a changeset :)

Thank you!

[Princesseuh]

Seems fine to me, wonky but it happens.