Bump async-http-client from 1.7.17 to 1.9.0 in /server

Bumps [async-http-client](https://github.com/AsyncHttpClient/async-http-client) from 1.7.17 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-1.7.17...async-http-client-1.9.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/server/pom.xml b/server/pom.xml
index 8c503aa..1d1c9fb 100644
--- a/server/pom.xml
+++ b/server/pom.xml
@@ -69,7 +69,7 @@
       <dependency>
         <groupId>com.ning</groupId>
         <artifactId>async-http-client</artifactId>
-        <version>1.7.17</version>
+        <version>1.9.0</version>
       </dependency>
     </dependencies>
   </dependencyManagement>