chore: bump assertthat from 6.0.1 to 6.2.1 (#313)

Bumps [assertthat](https://github.com/thenativeweb/assertthat) from 6.0.1 to 6.2.1.
- [Release notes](https://github.com/thenativeweb/assertthat/releases)
- [Changelog](https://github.com/thenativeweb/assertthat/blob/main/CHANGELOG.md)
- [Commits](thenativeweb/assertthat@6.0.1...6.2.1)

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

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

package.json

@@ -32,7 +32,7 @@
   "types": "build/lib/index.d.ts",
   "dependencies": {},
   "devDependencies": {
-    "assertthat": "6.0.1",
+    "assertthat": "6.2.1",
     "roboter": "11.6.48",
     "semantic-release-configuration": "2.0.1"
   },