Bump com.squareup.okio:okio from 2.9.0 to 3.4.0

Bumps [com.squareup.okio:okio](https://github.com/square/okio) from 2.9.0 to 3.4.0.
- [Changelog](https://github.com/square/okio/blob/master/CHANGELOG.md)
- [Commits](square/okio@parent-2.9.0...parent-3.4.0)

---
updated-dependencies:
- dependency-name: com.squareup.okio:okio
  dependency-type: direct:development
...

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

Author: dependabot[bot]

pom.xml

@@ -306,7 +306,7 @@
     <dependency>
       <groupId>com.squareup.okio</groupId>
       <artifactId>okio</artifactId>
-      <version>2.9.0</version>
+      <version>3.4.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>