Bump guava from 27.1-jre to 28.0-jre (#5049)

Bumps [guava](https://github.com/google/guava) from 27.1-jre to 28.0-jre.
- [Release notes](https://github.com/google/guava/releases)
- [Commits](https://github.com/google/guava/commits)

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

build.gradle

@@ -121,7 +121,7 @@ dependencies {
 
     compile 'net.java.dev.glazedlists:glazedlists_java15:1.9.1'
 
-    compile 'com.google.guava:guava:27.1-jre'
+    compile 'com.google.guava:guava:28.0-jre'
 
     // JavaFX stuff
     compile 'de.jensd:fontawesomefx-commons:8.15'