Fix value check logic for ms arg

Failing test as seen in:

https://runkit.com/neeksandhu/5a10bc3c761dce00128e5a33

index.js

@@ -9,7 +9,7 @@ class TimeoutError extends Error {
 }
 
 module.exports = (promise, ms, fallback) => new Promise((resolve, reject) => {
-	if (typeof ms !== 'number' && ms >= 0) {
+	if (typeof ms !== 'number' || ms < 0) {
 		throw new TypeError('Expected `ms` to be a positive number');
 	}