Update redis to 6.0.2, add alternative license file searcher

[crazywhalecc]

What does this PR do?

Update redis to 6.0.2, add alternative license file searcher, fixes #538

Checklist before merging

If your PR involves the changes mentioned below and completed the action, please tick the corresponding option.
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• If it's an extension or dependency update, make sure adding related extensions in src/global/test-extensions.php.
• If you changed the behavior of static-php-cli, update docs in ./docs/.
• If you updated config/xxx.json content, run bin/spc dev:sort-config xxx.