Use Array.prototype.some()

Closes #152

Author: Anand Thakker

lib/module_filters.js

@@ -54,12 +54,9 @@ module.exports = {
       var internal = internalModuleRegexp.test(id);
       return internal || (externalFilters &&
         externalFilters
-        .map(function (f) {
+        .some(function (f) {
           return f(file, pkg);
-        })
-        .reduce(function (a, b) {
-          return a || b;
-        }, false));
+        }));
     };
   }
 };