chore: update test dependencies

Author: renovate[bot]

client/package.json

@@ -80,7 +80,7 @@
     "babel-plugin-istanbul": "^7.0.0",
     "bpmnlint-loader": "^0.1.6",
     "case-sensitive-paths-webpack-plugin": "^2.1.2",
-    "chai": "^4.4.1",
+    "chai": "^5.0.0",
     "copy-webpack-plugin": "^12.0.2",
     "cross-env": "^7.0.0",
     "css-loader": "^7.0.0",
@@ -103,8 +103,8 @@
     "puppeteer": "^22.0.0",
     "react-svg-loader": "^3.0.3",
     "react-test-renderer": "^16.14.0",
-    "sinon": "^17.0.1",
-    "sinon-chai": "^3.7.0",
+    "sinon": "^18.0.0",
+    "sinon-chai": "^4.0.0",
     "style-loader": "^4.0.0",
     "webpack": "^5.90.2",
     "webpack-cli": "^5.0.0"