build(deps): bump core-js from 3.1.4 to 3.2.1

Bumps [core-js](https://github.com/zloirock/core-js) from 3.1.4 to 3.2.1.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](zloirock/core-js@3.1.4...v3.2.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -35,7 +35,7 @@
     "@angular/platform-browser": "^8.0.0",
     "@angular/platform-browser-dynamic": "^8.0.0",
     "@angular/router": "^8.0.0",
-    "core-js": "^3.1.4",
+    "core-js": "^3.2.1",
     "hammerjs": "^2.0.8",
     "rxjs": "^6.5.2",
     "zone.js": "^0.9.1"