fix: plugins/rollbar-backend/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-DIFF-14917201
- https://snyk.io/vuln/SNYK-JS-BACKSTAGEBACKENDPLUGINAPI-15054291
- https://snyk.io/vuln/SNYK-JS-LODASH-15053838
- https://snyk.io/vuln/SNYK-JS-LODASHES-15053836

Author: snyk-io[bot]

plugins/rollbar-backend/package.json

@@ -33,15 +33,15 @@
     "clean": "backstage-cli package clean"
   },
   "dependencies": {
-    "@backstage/backend-common": "workspace:^",
-    "@backstage/config": "workspace:^",
+    "@backstage/backend-common": "0.25.0",
+    "@backstage/config": "0.1.1",
     "@types/express": "^4.17.6",
     "compression": "^1.7.4",
     "cors": "^2.8.5",
     "express": "^4.17.1",
     "express-promise-router": "^4.1.0",
     "fs-extra": "10.1.0",
-    "lodash": "^4.17.21",
+    "lodash": "^4.17.23",
     "morgan": "^1.10.0",
     "node-fetch": "^2.6.7",
     "winston": "^3.2.1",