Fix dependencies for Node.js

Keep order as it was in lib/index.js@f8d2a3d629018b7e.
Damn, I have no idea how Node.js resolves dependencies, but
require('./lib/index').parse('a{b:c}') does’t work with old files.js

Author: NV

src/files.js

@@ -1,12 +1,12 @@
 exports.files = [
-	"StyleSheet",
+	"CSSStyleDeclaration",
 	"CSSRule",
 	"CSSStyleRule",
-	"CSSStyleSheet",
-	"CSSStyleDeclaration",
 	"MediaList",
 	"CSSMediaRule",
 	"CSSImportRule",
+	"StyleSheet",
+	"CSSStyleSheet",
 	"CSSKeyframesRule",
 	"CSSKeyframeRule",
 	"parse",