fix(deps): update dependency core-js to v3

Author: renovate-bot

package-lock.json

@@ -62,7 +62,7 @@
     "cordova-plugin-ionic-webview": "4.1.1",
     "cordova-plugin-splashscreen": "5.0.3",
     "cordova-plugin-whitelist": "1.3.4",
-    "core-js": "2.6.5",
+    "core-js": "3.3.5",
     "intersection-observer": "0.5.1",
     "ng-lottie": "0.3.2",
     "ngx-markdown": "7.1.5",