Fixed relative pathname regex

Author: Dallon Feldner

lib/index.js

@@ -84,7 +84,7 @@ module.exports = function setupHook({
    */
   function fetch(_to, from) {
     // getting absolute path to the processing file
-    const filename = /\w/i.test(_to[0])
+    const filename = /[^\\/?%*:|"<>\.]/i.test(_to[0])
       ? require.resolve(_to)
       : resolve(dirname(from), _to);