build(deps): bump io-ts from 2.2.20 to 2.2.21

Bumps [io-ts](https://github.com/gcanti/io-ts) from 2.2.20 to 2.2.21.
- [Release notes](https://github.com/gcanti/io-ts/releases)
- [Changelog](https://github.com/gcanti/io-ts/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gcanti/io-ts/commits)

---
updated-dependencies:
- dependency-name: io-ts
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -9,7 +9,7 @@
   "dependencies": {
     "core-js": "^3.8.3",
     "fp-ts": "^2.16.1",
-    "io-ts": "^2.2.20",
+    "io-ts": "^2.2.21",
     "msr": "^1.3.4",
     "screenfull": "^6.0.2",
     "url-join": "^5.0.0",