Use node assertions as standard solution

ts/features/steps/composition.ts

@@ -1,10 +1,10 @@
 import { When, Then } from '@cucumber/cucumber';
-import { expect } from 'chai';
+import assert from 'node:assert/strict';
 
 When('the step definitions are written in {word}', function (language: string) {
   this.language = language;
 });
 
 Then("I don't get a warning about undefined steps", function () {
-  expect(this.language).to.equal('TypeScript');
+  assert.equal(this.language, 'TypeScript');
 });

ts/package.json

@@ -10,12 +10,8 @@
   "author": "Eugen Wissner <belka@caraus.de>",
   "license": "MPL-2.0",
   "dependencies": {
-    "@cucumber/cucumber": "^11.1.1",
-    "chai": "^5.1.2",
+    "@cucumber/cucumber": "^12.0.0",
     "ts-node": "^10.9.2",
     "typescript": "^5.7.2"
-  },
-  "devDependencies": {
-    "@types/chai": "^5.0.1"
   }
 }