deps: update is-core-module requirement from ^2.5.0 to ^2.8.1 (#132)

Updates the requirements on [is-core-module](https://github.com/inspect-js/is-core-module) to permit the latest version.
- [Release notes](https://github.com/inspect-js/is-core-module/releases)
- [Changelog](https://github.com/inspect-js/is-core-module/blob/main/CHANGELOG.md)
- [Commits](inspect-js/is-core-module@v2.5.0...v2.8.1)

---
updated-dependencies:
- dependency-name: is-core-module
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "hosted-git-info": "^4.0.1",
-    "is-core-module": "^2.5.0",
+    "is-core-module": "^2.8.1",
     "semver": "^7.3.4",
     "validate-npm-package-license": "^3.0.4"
   },