chore: Upgrade flow (#1854)

* wip: upgrade flow

* chore: More sealed props improvements

* Final fixes

app/components/Image.js

@@ -2,10 +2,13 @@
 import * as React from "react";
 import { cdnPath } from "utils/urls";
 
-type Props = {
+type Props = {|
   alt: string,
   src: string,
-};
+  title?: string,
+  width?: number,
+  height?: number,
+|};
 
 export default function Image({ src, alt, ...rest }: Props) {
   return <img src={cdnPath(src)} alt={alt} {...rest} />;