Bump org.java-websocket:Java-WebSocket from 1.5.3 to 1.5.4

Bumps [org.java-websocket:Java-WebSocket](https://github.com/TooTallNate/Java-WebSocket) from 1.5.3 to 1.5.4.
- [Release notes](https://github.com/TooTallNate/Java-WebSocket/releases)
- [Changelog](https://github.com/TooTallNate/Java-WebSocket/blob/master/CHANGELOG.md)
- [Commits](TooTallNate/Java-WebSocket@v1.5.3...v1.5.4)

---
updated-dependencies:
- dependency-name: org.java-websocket:Java-WebSocket
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

client/build.gradle

@@ -24,7 +24,7 @@ dependencies {
     // https://github.com/slackapi/java-slack-sdk/releases
     implementation 'com.slack.api:slack-api-client:1.31.0'
     // https://mvnrepository.com/artifact/org.java-websocket/Java-WebSocket
-    implementation 'org.java-websocket:Java-WebSocket:1.5.3'
+    implementation 'org.java-websocket:Java-WebSocket:1.5.4'
 
     // https://mvnrepository.com/artifact/com.lexicalscope.jewelcli/jewelcli
     implementation group: 'com.lexicalscope.jewelcli', name: 'jewelcli', version: '0.8.9'