Bump core-js from 2.6.11 to 3.31.1

Bumps [core-js](https://github.com/zloirock/core-js/tree/HEAD/packages/core-js) from 2.6.11 to 3.31.1.
- [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/v3.31.1/packages/core-js)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -51,7 +51,7 @@
     "assert": "^2.0.0",
     "babel-loader": "^8.2.3",
     "body-scroll-lock": "^3.1.5",
-    "core-js": "2.6.11",
+    "core-js": "3.31.1",
     "d3": "^7.2.0",
     "datatables.net-buttons": "^2.1.1",
     "datatables.net-buttons-dt": "^2.1.1",