build(deps): bump core-js from 3.4.1 to 3.4.2 in /website/client (#11575)

Bumps [core-js](https://github.com/zloirock/core-js) from 3.4.1 to 3.4.2.
- [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/v3.4.1...v3.4.2)

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

website/client/package-lock.json

@@ -3283,9 +3283,9 @@
       }
     },
     "core-js": {
-      "version": "3.4.1",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.4.1.tgz",
-      "integrity": "sha512-KX/dnuY/J8FtEwbnrzmAjUYgLqtk+cxM86hfG60LGiW3MmltIc2yAmDgBgEkfm0blZhUrdr1Zd84J2Y14mLxzg=="
+      "version": "3.4.2",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.4.2.tgz",
+      "integrity": "sha512-bUTfqFWtNKWp73oNIfRkqwYZJeNT3lstzZcAkhhiuvDraRSgOH1/+F9ZklbpR4zpdKuo4cpXN8tKP7s61yjX+g=="
     },
     "core-js-compat": {
       "version": "3.3.4",

website/client/package.json

@@ -24,7 +24,7 @@
     "bootstrap": "^4.3.1",
     "bootstrap-vue": "^2.1.0",
     "chai": "^4.1.2",
-    "core-js": "^3.4.1",
+    "core-js": "^3.4.2",
     "eslint": "^6.7.1",
     "eslint-config-habitrpg": "^6.2.0",
     "eslint-plugin-mocha": "^5.3.0",