CompatHelper: bump compat for "DataFrames" to "0.22"

[github-actions[bot]]

This pull request changes the compat entry for the DataFrames package from ^0.21 to ^0.21, 0.22.

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.

[coveralls]

Pull Request Test Coverage Report for Build 607462539

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+1.8%) to 56.694%

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Totals
Change from base Build 607459280:	1.8%
Covered Lines:	1156
Relevant Lines:	2039

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💛 - Coveralls