fix: use real filesystem for tests again, mockFs is broken on Node 20

Author: AlCalzone

package-lock.json

@@ -39,7 +39,6 @@
     "@commitlint/config-conventional": "^17.6.5",
     "@tsconfig/node14": "^14.1.0",
     "@types/fs-extra": "^9.0.13",
-    "@types/mock-fs": "^4.13.1",
     "@types/node": "^14.18.37",
     "@types/proper-lockfile": "^4.1.2",
     "@typescript-eslint/eslint-plugin": "^5.60.1",
@@ -50,7 +49,6 @@
     "eslint-config-prettier": "^8.8.0",
     "eslint-plugin-prettier": "^4.2.1",
     "husky": "^8.0.3",
-    "mock-fs": "^5.2.0",
     "prettier": "^2.8.8",
     "source-map-support": "^0.5.21",
     "ts-node": "^10.9.1",