chore(deps): update dependency @types/chai to v4.2.4 (#918)

Author: renovate[bot]

package-lock.json

@@ -66,7 +66,7 @@
     "@angular/core": "9.0.0-next.12",
     "@commitlint/cli": "8.2.0",
     "@commitlint/config-angular": "8.2.0",
-    "@types/chai": "4.2.3",
+    "@types/chai": "4.2.4",
     "@types/mocha": "5.2.7",
     "@types/node": "11.15.0",
     "@types/node-sass": "4.11.0",