bug: doesn't parse `! important`

[wetneb]

Did you check existing issues?

• I have read all the tree-sitter docs if it relates to using the parser
• I have searched the existing issues of tree-sitter-css

Tree-Sitter CLI Version, if relevant (output of tree-sitter --version)

No response

Describe the bug

This is valid CSS and doesn't parse:

.test {
  padding-left: 0.4em ! important;
}

Steps To Reproduce/Bad Parse Tree

Parse the above

Expected Behavior/Parse Tree

Same as without a space between ! and important.

Repro

.test {
  padding-left: 0.4em ! important;
}

[mohamedmansour]

No, the CSS specification does not allow a space between the exclamation mark (!). The !important will be invalid, and the rule will be treated as if it has no importance override.

So this should not parse it, and having an ERROR is correct.