CompatHelper: bump compat for ForwardDiff to 1, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the ForwardDiff package from 0.10 to 0.10, 1.
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 88.64%. Comparing base (84282a2) to head (d092641).
Report is 5 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #181   +/-   ##
=======================================
  Coverage   88.64%   88.64%           
=======================================
  Files          13       13           
  Lines        2395     2395           
=======================================
  Hits         2123     2123           
  Misses        272      272           

Flag	Coverage Δ
unittests	88.64% <ø> (ø)

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