CompatHelper: bump compat for FastBroadcast to 0.3, (keep existing compat)

[github-actions[bot]]

This pull request changes the compat entry for the FastBroadcast package from 0.2 to 0.2, 0.3. 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-commenter]

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.12%. Comparing base (ea80bd4) to head (6260e27).

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #78 +/- ## ======================================= Coverage 97.12% 97.12% ======================================= Files 6 6 Lines 1250 1250 ======================================= Hits 1214 1214 Misses 36 36 ```

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