chore: update test dependencies

Author: renovate[bot]

package.json

@@ -76,7 +76,7 @@
     "bpmn-moddle": "^9.0.4",
     "camunda-bpmn-js-behaviors": "^1.12.0",
     "camunda-bpmn-moddle": "^7.0.1",
-    "chai": "^4.5.0",
+    "chai": "^6.0.0",
     "cross-env": "^10.0.0",
     "diagram-js": "^15.4.0",
     "downloadjs": "^1.4.7",
@@ -93,7 +93,7 @@
     "karma-mocha": "^2.0.1",
     "karma-sinon-chai": "^2.0.2",
     "karma-webpack": "^5.0.1",
-    "mocha": "^10.7.3",
+    "mocha": "^11.0.0",
     "mocha-test-container-support": "^0.2.0",
     "npm-run-all2": "^8.0.0",
     "puppeteer": "^24.16.2",
@@ -102,8 +102,8 @@
     "rimraf": "^6.0.1",
     "rollup": "^4.46.2",
     "rollup-plugin-react-svg": "^3.0.3",
-    "sinon": "^17.0.1",
-    "sinon-chai": "^3.7.0",
+    "sinon": "^21.0.0",
+    "sinon-chai": "^4.0.0",
     "webpack": "^5.101.2",
     "zeebe-bpmn-moddle": "^1.11.0"
   },