CompatHelper: bump compat for Soss to 0.21 for package ppl, (keep existing compat)

[github-actions[bot]]

This pull request changes the compat entry for the Soss package from 0.19, 0.20 to 0.19, 0.20, 0.21 for package ppl. This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry. It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov[bot]]

Codecov Report

Base: 97.62% // Head: 97.62% // No change to project coverage :thumbsup:

Coverage data is based on head (ef89c1a) compared to base (6ee8549). Patch has no changes to coverable lines.

:exclamation: Current head ef89c1a differs from pull request most recent head 1dd9478. Consider uploading reports for the commit 1dd9478 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #325   +/-   ##
=======================================
  Coverage   97.62%   97.62%           
=======================================
  Files          10       10           
  Lines         379      379           
=======================================
  Hits          370      370           
  Misses          9        9           

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[willtebbutt]

@devmotion can we close this?

[theogf]

I guess this can be closed due to #337