Bump core-js from 3.6.1 to 3.6.4

Bumps [core-js](https://github.com/zloirock/core-js) from 3.6.1 to 3.6.4.
- [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/compare/v3.6.1...v3.6.4)

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

package-lock.json

@@ -7544,9 +7544,9 @@
       }
     },
     "core-js": {
-      "version": "3.6.1",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.6.1.tgz",
-      "integrity": "sha512-186WjSik2iTGfDjfdCZAxv2ormxtKgemjC3SI6PL31qOA0j5LhTDVjHChccoc7brwLvpvLPiMyRlcO88C4l1QQ==",
+      "version": "3.6.4",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.6.4.tgz",
+      "integrity": "sha512-4paDGScNgZP2IXXilaffL9X7968RuvwlkK3xWtZRVqgd8SYNiVKRJvkFd1aqqEuPfN7E68ZHEp9hDj6lHj4Hyw==",
       "dev": true
     },
     "core-js-compat": {

package.json

@@ -237,7 +237,7 @@
     "chai": "^4.2.0",
     "chalk": "^3.0.0",
     "copy-webpack-plugin": "^5.1.1",
-    "core-js": "^3.6.1",
+    "core-js": "^3.6.4",
     "cross-env": "^5.1.6",
     "css-loader": "^3.2.0",
     "del": "^5.1.0",