Bump @feathersjs/authentication-oauth from 4.5.15 to 5.0.21

Bumps [@feathersjs/authentication-oauth](https://github.com/feathersjs/feathers/tree/HEAD/packages/authentication-oauth) from 4.5.15 to 5.0.21.
- [Release notes](https://github.com/feathersjs/feathers/releases)
- [Changelog](https://github.com/feathersjs/feathers/blob/dove/packages/authentication-oauth/CHANGELOG.md)
- [Commits](https://github.com/feathersjs/feathers/commits/v5.0.21/packages/authentication-oauth)

---
updated-dependencies:
- dependency-name: "@feathersjs/authentication-oauth"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -38,7 +38,7 @@
     "@feathersjs/authentication": "^4.5.15",
     "@feathersjs/authentication-jwt": "^2.0.10",
     "@feathersjs/authentication-local": "^4.5.15",
-    "@feathersjs/authentication-oauth": "^4.5.15",
+    "@feathersjs/authentication-oauth": "^5.0.21",
     "@feathersjs/configuration": "^4.5.15",
     "@feathersjs/errors": "^5.0.21",
     "@feathersjs/express": "^4.5.15",