Validate missing prop types

src/components/skill/index.jsx

@@ -1,5 +1,6 @@
 import config from '../../ezprofile.config';
 import { skeleton } from '../../helpers/utils';
+import PropTypes from 'prop-types';
 
 const Skill = ({ loading }) => {
   const renderSkeleton = () => {
@@ -50,4 +51,8 @@ const Skill = ({ loading }) => {
   );
 };
 
+Skill.propTypes = {
+  loading: PropTypes.bool,
+};
+
 export default Skill;