moved constants into upper scope

lib/single-file/rules-minifier.js

@@ -22,6 +22,10 @@
 
 this.rulesMinifier = this.rulesMinifier || (() => {
 
+	const SEPARATOR_TYPES = ["descendant", "child", "sibling", "adjacent"];
+	const REMOVED_PSEUDO_CLASSES = ["focus", "focus-within", "hover", "link", "visited", "active"];
+	const REMOVED_PSEUDO_ELEMENTS = ["after", "before", "first-line", "first-letter"];
+
 	return {
 		process: doc => {
 			const selectorsData = new Set();
@@ -70,10 +74,6 @@ this.rulesMinifier = this.rulesMinifier || (() => {
 	}
 
 	function getFilteredSelector(selector) {
-		const SEPARATOR_TYPES = ["descendant", "child", "sibling", "adjacent"];
-		const REMOVED_PSEUDO_CLASSES = ["focus", "focus-within", "hover", "link", "visited", "active"];
-		const REMOVED_PSEUDO_ELEMENTS = ["after", "before", "first-line", "first-letter"];
-
 		const selectors = cssWhat.parse(selector);
 		return cssWhat.stringify(selectors.map(selector => filterPseudoClasses(selector)));