* always prepend the Tailwind License
Even when you are not using preflight.
* drop the Tailwind License from the preflight plugin
* drop the license in the tests
This allows us to focus on the actual generated CSS without the license.
The license also includes the version number which we would have to
update every time we release a new version.
* update the source maps snapshots
* always prepend the license when using the CLI
* update Tailwind CLI integration test
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