CompatHelper: add new compat entry for ForwardDiff in [weakdeps] at version 0.10, (keep existing compat)

[github-actions]

This pull request sets the compat entry for the ForwardDiff package to 0.10.
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.
Note: Consider registering a new release of your package immediately after merging this PR, as downstream packages may depend on this for tests to pass.

[coveralls]

Pull Request Test Coverage Report for Build 9387716375

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-1.3%) to 79.065%

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Totals
Change from base Build 9387708823:	-1.3%
Covered Lines:	2723
Relevant Lines:	3444

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💛 - Coveralls