BREAKING: Upgrade TypeScript to v5.9.3 (#1746)

Upgrades from TypeScript v4.3.5 to v5.9.3. All tests pass successfully.

Author: taeold

package-lock.json

@@ -316,7 +316,7 @@
     "semver": "^7.3.5",
     "sinon": "^9.2.4",
     "ts-node": "^10.4.0",
-    "typescript": "^4.3.5",
+    "typescript": "^5.9.3",
     "yaml": "^2.8.1",
     "yargs": "^15.3.1"
   },