Bump gson from 2.8.6 to 2.8.7

Bumps [gson](https://github.com/google/gson) from 2.8.6 to 2.8.7.
- [Release notes](https://github.com/google/gson/releases)
- [Changelog](https://github.com/google/gson/blob/master/CHANGELOG.md)
- [Commits](google/gson@gson-parent-2.8.6...gson-parent-2.8.7)

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

build.gradle

@@ -59,7 +59,7 @@ sourceSets {
 dependencies {
   compile group: 'cd.go.plugin.base', name: 'gocd-plugin-base', version: '0.0.1'
   compileOnly group: 'cd.go.plugin', name: 'go-plugin-api', version: '21.2.0'
-  compile group: 'com.google.code.gson', name: 'gson', version: '2.8.6'
+  compile group: 'com.google.code.gson', name: 'gson', version: '2.8.7'
   compile group: 'com.amazonaws', name: 'aws-java-sdk-secretsmanager', version: '1.11.931'
   compile group: 'com.amazonaws.secretsmanager', name: 'aws-secretsmanager-caching-java', version: '1.0.1'