[ADD]🚀 GifGridItem tests added

Author: joalbertg

src/components/GifGridItem.js

@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 
 const GifGridItem = ({url, title}) => {
   return (
@@ -9,5 +10,10 @@ const GifGridItem = ({url, title}) => {
   );
 }
 
+GifGridItem.propTypes = {
+  url: PropTypes.string.isRequired,
+  title: PropTypes.string.isRequired
+}
+
 export default GifGridItem;