Bump async-http-client from 1.8.9 to 1.9.0 in /agent/store/cube

Bumps [async-http-client](https://github.com/AsyncHttpClient/async-http-client) from 1.8.9 to 1.9.0.
- [Release notes](https://github.com/AsyncHttpClient/async-http-client/releases)
- [Changelog](https://github.com/AsyncHttpClient/async-http-client/blob/master/CHANGES.md)
- [Commits](https://github.com/AsyncHttpClient/async-http-client/compare/async-http-client-1.8.9...async-http-client-1.9.0)

---
updated-dependencies:
- dependency-name: com.ning:async-http-client
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/agent/store/cube/pom.xml b/agent/store/cube/pom.xml
index 87360a8..bf494b6 100644
--- a/agent/store/cube/pom.xml
+++ b/agent/store/cube/pom.xml
@@ -65,7 +65,7 @@
     <dependency>
       <groupId>com.ning</groupId>
       <artifactId>async-http-client</artifactId>
-      <version>1.8.9</version>
+      <version>1.9.0</version>
       <optional>true</optional>
     </dependency>