build(deps): bump core-js from 3.20.3 to 3.21.0

Bumps [core-js](https://github.com/zloirock/core-js) from 3.20.3 to 3.21.0.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](zloirock/core-js@v3.20.3...v3.21.0)

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

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

package.json

@@ -25,7 +25,7 @@
     "bulma": "^0.9.3",
     "compression": "^1.7.4",
     "connect-history-api-fallback": "^1.6.0",
-    "core-js": "^3.20.3",
+    "core-js": "^3.21.0",
     "express": "^4.17.2",
     "jest-canvas-mock": "^2.3.1",
     "jspdf": "^2.5.1",

yarn.lock

@@ -3961,10 +3961,10 @@ core-js@^2.4.0:
   resolved "https://registry.yarnpkg.com//core-js/-/core-js-2.6.12.tgz#d9333dfa7b065e347cc5682219d6f690859cc2ec"
   integrity sha512-Kb2wC0fvsWfQrgk8HU5lW6U/Lcs8+9aaYcy4ZFc6DDlo4nZ7n70dEgE5rtR0oG6ufKDUnrwfWL1mXR5ljDatrQ==
 
-core-js@^3.20.3, core-js@^3.6.0, core-js@^3.6.5, core-js@^3.8.3:
-  version "3.20.3"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.20.3.tgz#c710d0a676e684522f3db4ee84e5e18a9d11d69a"
-  integrity sha512-vVl8j8ph6tRS3B8qir40H7yw7voy17xL0piAjlbBUsH7WIfzoedL/ZOr1OV9FyZQLWXsayOJyV4tnRyXR85/ag==
+core-js@^3.21.0, core-js@^3.6.0, core-js@^3.6.5, core-js@^3.8.3:
+  version "3.21.0"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.21.0.tgz#f479dbfc3dffb035a0827602dd056839a774aa71"
+  integrity sha512-YUdI3fFu4TF/2WykQ2xzSiTQdldLB4KVuL9WeAy5XONZYt5Cun/fpQvctoKbCgvPhmzADeesTk/j2Rdx77AcKQ==
 
 core-util-is@1.0.2:
   version "1.0.2"