Bump gson from 2.8.2 to 2.8.6

Bumps [gson](https://github.com/google/gson) from 2.8.2 to 2.8.6.
- [Release notes](https://github.com/google/gson/releases)
- [Changelog](https://github.com/google/gson/blob/master/CHANGELOG.md)
- [Commits](google/gson@gson-parent-2.8.2...gson-parent-2.8.6)

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

Author: dependabot[bot]

build.gradle

@@ -32,7 +32,7 @@ dependencies {
     // Use JUnit test framework
     testImplementation 'junit:junit:4.13'
 
-    compile 'com.google.code.gson:gson:2.8.2'
+    compile 'com.google.code.gson:gson:2.8.6'
 
     compile 'com.sun.jersey:jersey-server:1.19.4'