Bump guava from 19.0 to 23.0

Bumps [guava](https://github.com/google/guava) from 19.0 to 23.0.
- [Release notes](https://github.com/google/guava/releases)
- [Commits](google/guava@v19.0...v23.0)

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

build.gradle

@@ -69,5 +69,5 @@ dependencies {
         exclude module: 'logback-classic'
     }
 
-    compile('com.google.guava:guava:19.0')
+    compile('com.google.guava:guava:23.0')
 }