Fix linting

packages/app/package.json

@@ -17,6 +17,7 @@
     "@material-ui/core": "^4.9.1",
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "4.0.0-alpha.45",
+    "http-proxy-middleware": "^1.0.3",
     "prop-types": "^15.7.2",
     "react": "^16.12.0",
     "react-dom": "^16.12.0",
@@ -26,11 +27,11 @@
   },
   "devDependencies": {
     "@testing-library/cypress": "^6.0.0",
-    "@types/jquery": "^3.3.34",
     "@testing-library/jest-dom": "^4.2.4",
     "@testing-library/react": "^9.3.2",
     "@testing-library/user-event": "^7.1.2",
     "@types/jest": "^24.0.0",
+    "@types/jquery": "^3.3.34",
     "@types/node": "^12.0.0",
     "@types/react-router-dom": "^5.1.3",
     "@types/zen-observable": "^0.8.0",