auth-backend: revert jose to v3

plugins/auth-backend/package.json

@@ -16,11 +16,6 @@
     "url": "https://github.com/backstage/backstage",
     "directory": "plugins/auth-backend"
   },
-  "jest": {
-    "moduleNameMapper": {
-      "^jose/(.*)$": "<rootDir>/../../../node_modules/jose/dist/node/cjs/$1"
-    }
-  },
   "keywords": [
     "backstage"
   ],
@@ -49,7 +44,7 @@
     "fs-extra": "^9.0.0",
     "got": "^11.5.2",
     "helmet": "^4.0.0",
-    "jose": "^3.5.1",
+    "jose": "^1.27.1",
     "jwt-decode": "^3.1.0",
     "knex": "^0.21.6",
     "moment": "^2.26.0",