chore: Missing flow types

app/components/DropToImport.js

@@ -2,7 +2,7 @@
 import * as React from "react";
 import { observable } from "mobx";
 import { observer, inject } from "mobx-react";
-import { withRouter, type RouterHistory } from "react-router-dom";
+import { withRouter, type RouterHistory, type Match } from "react-router-dom";
 import { createGlobalStyle } from "styled-components";
 import invariant from "invariant";
 import importFile from "utils/importFile";
@@ -22,7 +22,7 @@ type Props = {
   documents: DocumentsStore,
   disabled: boolean,
   location: Object,
-  match: Object,
+  match: Match,
   history: RouterHistory,
   staticContext: Object,
 };