Update dependency chai to v6

Author: renovate[bot]

package-lock.json

@@ -42,7 +42,7 @@
     "@babel/preset-env": "^7.16.0",
     "@babel/register": "^7.16.0",
     "asserts": "^4.0.2",
-    "chai": "^4.3.4",
+    "chai": "^6.0.0",
     "coveralls": "^3.1.1",
     "mocha": "^10.0.0",
     "nyc": "^15.1.0",