chore(deps): update dependency chai to v6

Author: renovate[bot]

package-lock.json

@@ -43,7 +43,7 @@
   },
   "devDependencies": {
     "@rollup/plugin-commonjs": "16.0.0",
-    "chai": "4.2.0",
+    "chai": "6.1.0",
     "gulp": "4.0.2",
     "mocha": "8.2.1",
     "rimraf": "3.0.2",