chore: update test dependencies

Author: renovate[bot]

package.json

@@ -77,7 +77,7 @@
     "bpmn-moddle": "^9.0.1",
     "camunda-bpmn-js-behaviors": "^1.3.0",
     "camunda-bpmn-moddle": "^7.0.1",
-    "chai": "^4.4.1",
+    "chai": "^5.0.0",
     "cross-env": "^7.0.3",
     "diagram-js": "^14.4.0",
     "downloadjs": "^1.4.7",
@@ -103,7 +103,7 @@
     "rimraf": "^5.0.5",
     "rollup": "^4.9.6",
     "rollup-plugin-react-svg": "^3.0.3",
-    "sinon": "^17.0.1",
+    "sinon": "^18.0.0",
     "sinon-chai": "^3.7.0",
     "webpack": "^5.89.0",
     "zeebe-bpmn-moddle": "^1.1.0"