chore: update test dependencies

Author: renovate[bot]

package.json

@@ -55,7 +55,7 @@
     "babel-plugin-istanbul": "^6.1.1",
     "bpmn-js": "^17.2.1",
     "bpmn-js-properties-panel": "^5.14.0",
-    "chai": "^4.4.1",
+    "chai": "^5.0.0",
     "copy-webpack-plugin": "^12.0.2",
     "cross-env": "^7.0.3",
     "downloadjs": "^1.4.7",
@@ -77,7 +77,7 @@
     "puppeteer": "^22.6.1",
     "rollup": "^4.13.1",
     "rollup-plugin-string": "^3.0.0",
-    "sinon": "^17.0.1",
+    "sinon": "^18.0.0",
     "sinon-chai": "^3.7.0",
     "webpack": "^5.91.0",
     "webpack-cli": "^5.1.4",