Update internal Node.js function call

This updates the call to _resolveLookupPaths. It returns a string
by default since Node.js v8 when called with a third truthy argument.
The backwards compatible return value should change soon, so detect
what return type is used and handle both cases.

Refs: nodejs/node#26983

lib/requizzle.js

@@ -40,13 +40,12 @@ var path = require('path');
  */
 
 function isNativeModule(targetPath, parentModule) {
-	var lookupPaths = Module._resolveLookupPaths(targetPath, parentModule);
-
-	if (lookupPaths[0] === targetPath && lookupPaths[1].length === 0) {
+	var lookupPaths = Module._resolveLookupPaths(targetPath, parentModule, true);
+	if (typeof lookupPaths === 'string')
+		return false;
+	if (lookupPaths === null)
 		return true;
-	}
-
-	return false;
+	return lookupPaths[0] === targetPath && lookupPaths[1].length === 0;
 }
 
 /**