Allow Haml 6.3

[tagliala]

No description provided.

[robbl-as]

To me, the problem is, that we can update haml-lint or haml, but not execute haml-lint afterwards. it Isn't there a solution to use gemfile dependencies to communicate compatibility? Is there a reason, why this is not done, yet? The advantage would be that versions would always be compatible with each other, right?

[tagliala]

Here it is the reason why at the moment Haml is updatable but Haml lint isn't

#447 (comment)

(TL;DR: haml-lint should not prevent the update of a production library. It is not ideal, but it is better to fail in this way)

[tagliala]

Also, there are breaking changes and deprecation between minor version of Haml. In this case, we have this: https://github.com/haml/haml/blob/main/CHANGELOG.md#630