generate new test that did already exist & update all module snippets with declaration

test/isPromiseLike/isPromiseLike.js

@@ -1,4 +1,4 @@
-module.exports = obj =>
+module.exports = isPromiseLike = obj =>
 obj !== null &&
 (typeof obj === 'object' || typeof obj === 'function') &&
 typeof obj.then === 'function';