Added PropTypes

Added type-checking for the props passed to the component.

Author: Salem

src/index.js

@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 
 class GoogleFontLoader extends React.PureComponent {
     link = null;
@@ -48,4 +49,13 @@ class GoogleFontLoader extends React.PureComponent {
     render = () => null;
 };
 
+GoogleFontLoader.propTypes = {
+    fonts: PropTypes.arrayOf(
+        PropTypes.shape({
+            font: PropTypes.string,
+            weights: PropTypes.arrayOf(PropTypes.number),
+        }),
+    ),
+};
+
 export default GoogleFontLoader;