Bring TS-Node back just to make Oclif happy

Turns out Oclif's built-in TS support is fully dependent on ts-node (at
least for Oclif v1) so without it we'd reverted to "npm start" running
the built code only, without watching & rebuilding from TS sources.

Author: pimterry

package-lock.json

@@ -138,6 +138,7 @@
     "stripe": "^8.202.0",
     "superagent": "^7.1.1",
     "ts-loader": "^9.4.2",
+    "ts-node": "^10.9.2",
     "tsx": "^4.16.2",
     "typescript": "~4.7",
     "umd-compat-loader": "^2.1.2",