Add support for squashing images.

[tomprince]

No description provided.

[codecov-commenter]

Codecov Report

Merging #735 into master will decrease coverage by 0.07%.
The diff coverage is 61.90%.

@@            Coverage Diff             @@
##           master     #735      +/-   ##
==========================================
- Coverage   79.43%   79.35%   -0.08%     
==========================================
  Files         102      102              
  Lines        4668     4689      +21     
==========================================
+ Hits         3708     3721      +13     
- Misses        531      535       +4     
- Partials      429      433       +4     

Impacted Files	Coverage Δ
pkg/v1/mutate/mutate.go	73.60% <61.90%> (-1.40%)	⬇️

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[imjasonh]

First of all sorry for the long delay in responding.

The change itself lgtm and I think there are some cool use cases it unlocks. So yay!

The only nit I think is with the name squash -- in other contexts where this has been done it's been called flatten, which I think is slightly more descriptive.

If you're open to renaming (and you're still interested after all this time) I think we can merge this mostly as-is.

[github-actions]

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[tomprince]

I'd be happy to see this land, but I'm no longer with the company where I wanted this, so probably won't have the time to make changes.