improvement: flow coverage

src/components/Icon/Icon.js

@@ -1,7 +1,15 @@
+// @flow
 import React from 'react';
 import styles from './Icon.module.scss';
 
-const Icon = ({ icon }) => (
+type Props = {
+  icon: {
+    viewBox?: string,
+    path?: string
+  }
+};
+
+const Icon = ({ icon }: Props) => (
   <svg className={styles['icon']} viewBox={icon.viewBox}>
     <path d={icon.path} />
   </svg>

src/components/Icon/Icon.test.js

@@ -1,3 +1,4 @@
+// @flow
 import React from 'react';
 import renderer from 'react-test-renderer';
 import Icon from './Icon';

src/components/Icon/index.js

@@ -1 +1,2 @@
+// @flow
 export { default } from './Icon';