chore(deps): update dependency tslib to v2.4.0

Author: renovate-bot

package-lock.json

@@ -62,7 +62,7 @@
     "ngrx-entity-relationship": "1.7.1",
     "reflect-metadata": "0.1.13",
     "rxjs": "6.6.7",
-    "tslib": "2.3.1",
+    "tslib": "2.4.0",
     "typeorm": "0.3.6",
     "zone.js": "0.11.5"
   },