Add test to keep track dependencies in sync (#169)

* add test to keep track dependencies in sync

The dependencies in the test runner are regularly being updated. If
there are exercises in the track repo that depend by default on outdated
versions of these libraries, that could lead to confusion and even
failed test runs.

We will be able to run this test whenever a commit is pushed to the main
branch of the test runner repo, notifying us that we should update the
track repo.

* add CI workflow for track_deps_are_up_to_date

Author: senekor

.github/workflows/track_deps_are_up_to_date.yml

@@ -0,0 +1,17 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  test:
+    name: Check if track dependencies are up to date
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
+
+      - name: Check if track dependencies are up to date
+        run: cd track_deps_are_up_to_date && cargo test