refactor: reduce dependency pain by moving to better maintained libs

[axe312ger]

node-vibrant didnt get any updates for some years. This leads to a lot of old and unnessecary dependencies.

This updates to the more and better maitained fork at https://github.com/GriffinJohnston/sharp-vibrant

same for potrace, moving to @gatsbyjs/potrace as the gatsbyjs team is so nice to keep dependencies up 2 date

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 81.81818% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 87.40%. Comparing base (0cc6918) to head (bba821a).
Report is 3 commits behind head on master.

Files	Patch %	Lines
packages/sqip/src/sqip.ts	80.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #342      +/-   ##
==========================================
+ Coverage   87.27%   87.40%   +0.13%     
==========================================
  Files          11       11              
  Lines         550      548       -2     
  Branches       90       89       -1     
==========================================
- Hits          480      479       -1     
+ Misses         62       61       -1     
  Partials        8        8              

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[axe312ger]

Great! The more modern dependencies seem together with the removal of probe-image-size are faster!

Old:

New: