Bump org.java-websocket:Java-WebSocket from 1.5.6 to 1.5.7

Bumps [org.java-websocket:Java-WebSocket](https://github.com/TooTallNate/Java-WebSocket) from 1.5.6 to 1.5.7.
- [Release notes](https://github.com/TooTallNate/Java-WebSocket/releases)
- [Changelog](https://github.com/TooTallNate/Java-WebSocket/blob/master/CHANGELOG.md)
- [Commits](TooTallNate/Java-WebSocket@v1.5.6...v1.5.7)

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

Signed-off-by: dependabot[bot] <[email protected]>

clientserver/build.gradle

@@ -19,7 +19,7 @@ dependencies {
     implementation group: 'com.google.code.gson', name: 'gson', version: '2.10.1'		// https://mvnrepository.com/artifact/com.google.code.gson/gson
 
     // webrtc
-    implementation group: 'org.java-websocket', name: 'Java-WebSocket', version: '1.5.6'
+    implementation group: 'org.java-websocket', name: 'Java-WebSocket', version: '1.5.7'
     // Needs to be API since WebRTCConnection implements PeerConnectionObserver and RTCDataChannelObserver.
     implementation 'dev.onvoid.webrtc:webrtc-java:0.8.0'
     if (osdetector.os.is('windows'))