Bump okio from 2.6.0 to 2.10.0 (#323)

Bumps [okio](https://github.com/square/okio) from 2.6.0 to 2.10.0.
- [Release notes](https://github.com/square/okio/releases)
- [Changelog](https://github.com/square/okio/blob/master/CHANGELOG.md)
- [Commits](https://github.com/square/okio/compare/parent-2.6.0...parent-2.10.0)

---
updated-dependencies:
- dependency-name: com.squareup.okio:okio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

buildsystem/dependencies.gradle

@@ -26,7 +26,7 @@ ext.versions = [
         retrofit          : '2.9.0',
         jsr305            : '3.0.2',
         okHttp            : '4.6.0',
-        okio              : '2.6.0',
+        okio              : '2.10.0',
         moshi             : '1.12.0',
         appCompat         : '1.3.1',
         fragment          : '1.3.6',