fix(deps): update dependency tslib to v1.12.0

Author: renovate-bot

package-lock.json

@@ -39,7 +39,7 @@
     "prismjs": "1.19.0",
     "rxjs": "6.5.5",
     "rxjs-compat": "6.5.5",
-    "tslib": "1.11.2",
+    "tslib": "1.12.0",
     "zone.js": "0.10.3"
   },
   "devDependencies": {