bump compat for HerbSpecification to 0.2

[github-actions]

This pull request changes the compat entry for the HerbSpecification package from ^0.1.0 to ^0.1.0, 0.2.
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]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.88%. Comparing base (584ea42) to head (b1aa1a1).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #34      +/-   ##
==========================================
- Coverage   28.57%   27.88%   -0.69%     
==========================================
  Files           2        1       -1     
  Lines         105      104       -1     
==========================================
- Hits           30       29       -1     
  Misses         75       75              

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[pwochner]

No complaints.