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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-TAR-15038581
- https://snyk.io/vuln/SNYK-JS-ELLIPTIC-14908844
- https://snyk.io/vuln/SNYK-JS-BACKSTAGEBACKENDPLUGINAPI-15054291
- https://snyk.io/vuln/SNYK-JS-LODASH-15053838
- https://snyk.io/vuln/SNYK-JS-LODASHES-15053836
- https://snyk.io/vuln/SNYK-JS-DIFF-14917201

Author: snyk-bot

plugins/kafka-backend/package.json

@@ -35,16 +35,16 @@
     "clean": "backstage-cli package clean"
   },
   "dependencies": {
-    "@backstage/backend-common": "workspace:^",
-    "@backstage/backend-plugin-api": "workspace:^",
-    "@backstage/catalog-model": "workspace:^",
-    "@backstage/config": "workspace:^",
+    "@backstage/backend-common": "0.25.0",
+    "@backstage/backend-plugin-api": "1.6.1",
+    "@backstage/catalog-model": "0.1.1",
+    "@backstage/config": "0.1.1",
     "@backstage/errors": "workspace:^",
     "@types/express": "^4.17.6",
     "express": "^4.17.1",
     "express-promise-router": "^4.1.0",
     "kafkajs": "^2.0.0",
-    "lodash": "^4.17.21",
+    "lodash": "^4.17.23",
     "winston": "^3.2.1"
   },
   "devDependencies": {