fix: plugins/code-coverage/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/code-coverage/package.json

@@ -25,10 +25,10 @@
   "dependencies": {
     "@backstage/catalog-model": "workspace:^",
     "@backstage/config": "workspace:^",
-    "@backstage/core-components": "workspace:^",
-    "@backstage/core-plugin-api": "workspace:^",
+    "@backstage/core-components": "0.1.0",
+    "@backstage/core-plugin-api": "0.1.0",
     "@backstage/errors": "workspace:^",
-    "@backstage/plugin-catalog-react": "workspace:^",
+    "@backstage/plugin-catalog-react": "0.0.1",
     "@backstage/theme": "workspace:^",
     "@material-ui/core": "^4.12.2",
     "@material-ui/icons": "^4.9.1",