fix: quater milimeters not detected

Author: AndyOGo

lib/nodes/Numeric.js

@@ -14,7 +14,7 @@ const { registerWalker } = require('../walker');
 
 const Node = require('./Node');
 
-const unitRegex = /%|ch|cm|em|ex|in|mm|pc|pt|px|rem|vh|vmax|vmin|vw$/i;
+const unitRegex = /%|ch|cm|em|ex|in|mm|pc|pt|px|q|rem|vh|vmax|vmin|vw$/i;
 
 class Numeric extends Node {
   constructor(options = {}) {