chore(deps): update dependency chai to v4.3.7

Author: renovate[bot]

package-lock.json

@@ -63,7 +63,7 @@
     "@types/node": "10.17.14",
     "@types/request": "2.48.4",
     "@types/ws": "7.4.5",
-    "chai": "4.2.0",
+    "chai": "4.3.7",
     "eslint": "6.8.0",
     "mocha": "7.2.0",
     "prettier": "1.19.1",