Bump ch.qos.logback:logback-classic from 1.4.7 to 1.5.6

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.4.7 to 1.5.6.
- [Commits](qos-ch/logback@v_1.4.7...v_1.5.6)

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-classic
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle

@@ -30,7 +30,7 @@ dependencies {
     compile group: 'com.lmax', name: 'disruptor', version: '3.4.4'
 
     // Logback
-    compile group: 'ch.qos.logback', name: 'logback-classic', version: '1.4.7'
+    compile group: 'ch.qos.logback', name: 'logback-classic', version: '1.5.6'
 }
 
 run {