build(deps-dev): bump mercurius from 8.12.0 to 9.1.0

Bumps [mercurius](https://github.com/mercurius-js/mercurius) from 8.12.0 to 9.1.0.
- [Release notes](https://github.com/mercurius-js/mercurius/releases)
- [Commits](mercurius-js/mercurius@v8.12.0...v9.1.0)

---
updated-dependencies:
- dependency-name: mercurius
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -62,7 +62,7 @@
     "graphql": "^15.6.0",
     "husky": "^7.0.2",
     "lint-staged": "^12.0.2",
-    "mercurius": "^8.3.0",
+    "mercurius": "^9.1.0",
     "nodemon": "^2.0.12",
     "prettier": "^2.4.1",
     "pretty-quick": "^3.1.1",