Move react type from devDeps to deps

Signed-off-by: Eric Peterson <ericpeterson@spotify.com>

plugins/search/package.json

@@ -38,6 +38,7 @@
     "@material-ui/core": "^4.11.0",
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "4.0.0-alpha.45",
+    "@types/react": "^16.9",
     "qs": "^6.9.4",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",