Debug.todo in Paola's Prestigious Pizza

The use of Debug.todo is problematic in this concept exercise. After I implemented the first task I hit this error.

We received the following error when we ran your code:

elm-test-rs 3.0.0 for elm 0.19.1
--------------------------------

✓ Compilation of tests modules succeeded

node:internal/event_target:1100
  process.nextTick(() => { throw err; });
                           ^
Error: TODO in module `PaolasPrestigiousPizza` on line 31

Please implement this parser
    at _Debug_crash (/tmp/solution/elm-stuff/tests-0.19.1/js/Runner.elm.js:499:10)
    at /tmp/solution/elm-stuff/tests-0.19.1/js/Runner.elm.js:255:3
    at /tmp/solution/elm-stuff/tests-0.19.1/js/Runner.elm.js:3991:4
    at Object.<anonymous> (/tmp/solution/elm-stuff/tests-0.19.1/js/Runner.elm.js:5636:86)
    at Module._compile (node:internal/modules/cjs/loader:1376:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1435:10)
    at Module.load (node:internal/modules/cjs/loader:1207:32)
    at Module._load (node:internal/modules/cjs/loader:1023:12)
    at Module.require (node:internal/modules/cjs/loader:1235:19)
    at require (node:internal/modules/helpers:176:18)
Emitted 'error' event on Worker instance at:
    at [kOnErrorMessage] (node:internal/worker:326:10)
    at [kOnMessage] (node:internal/worker:337:37)
    at MessagePort.<anonymous> (node:internal/worker:232:57)
    at [nodejs.internal.kHybridDispatch] (node:internal/event_target:826:20)
    at exports.emitMessage (node:internal/per_context/messageport:23:28)

Node.js v20.11.1

Changing all Debug.todo to Parser.problem fixed it and allowed me to move on to the next task.

Thanks Glenn, this should be easy enough to fix up.

PR here