chore:(deps): bump core-js from 3.13.1 to 3.15.0

Bumps [core-js](https://github.com/zloirock/core-js/tree/HEAD/packages/core-js) from 3.13.1 to 3.15.0.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/zloirock/core-js/commits/v3.15.0/packages/core-js)

---
updated-dependencies:
- dependency-name: core-js
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -41,7 +41,7 @@
     "@types/d3-hierarchy": "^2.0.0",
     "@types/d3-transition": "1.1.5",
     "apollo-angular": "^2.6.0",
-    "core-js": "^3.13.1",
+    "core-js": "^3.15.0",
     "d3-array": "^2.12.0",
     "d3-axis": "^2.1.0",
     "d3-brush": "^1.1.6",