Bump assert-helpers from 8.4.0 to 11.12.0

Bumps [assert-helpers](https://github.com/bevry/assert-helpers) from 8.4.0 to 11.12.0.
- [Changelog](https://github.com/bevry/assert-helpers/blob/master/HISTORY.md)
- [Commits](bevry/assert-helpers@v8.4.0...v11.12.0)

---
updated-dependencies:
- dependency-name: assert-helpers
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -104,7 +104,7 @@
   },
   "devDependencies": {
     "@bevry/update-contributors": "^1.20.0",
-    "assert-helpers": "^8.4.0",
+    "assert-helpers": "^11.12.0",
     "bal-util": "^2.8.0",
     "core-js": "^3.16.0",
     "eslint": "^7.31.0",