Add missing package.json files for react-router-dom (#4391)

Author: insin

packages/react-router-dom/package.json

@@ -12,8 +12,17 @@
     "BrowserRouter.js",
     "HashRouter.js",
     "Link.js",
+    "MemoryRouter.js",
     "NavLink.js",
+    "Prompt.js",
+    "Redirect.js",
+    "Route.js",
+    "Router.js",
+    "StaticRouter.js",
+    "Switch.js",
     "index.js",
+    "matchPath.js",
+    "withRouter.js",
     "README.md",
     "umd"
   ],