Bump lint-staged from 10.3.0 to 10.4.0 in /packages/webapp

Bumps [lint-staged](https://github.com/okonet/lint-staged) from 10.3.0 to 10.4.0.
- [Release notes](https://github.com/okonet/lint-staged/releases)
- [Commits](https://github.com/okonet/lint-staged/compare/v10.3.0...v10.4.0)

Signed-off-by: dependabot[bot] <support@github.com>

packages/webapp/package.json

@@ -43,7 +43,7 @@
     "eslint-plugin-cypress": "2.11.1",
     "eslint-plugin-react": "7.20.6",
     "husky": "4.3.0",
-    "lint-staged": "10.3.0",
+    "lint-staged": "10.4.0",
     "prettier": "2.1.1"
   },
   "keywords": [