build(deps): bump gson from 2.8.7 to 2.8.8 (appium#1507)

Bumps [gson](https://github.com/google/gson) from 2.8.7 to 2.8.8. - [Release notes](https://github.com/google/gson/releases) - [Changelog](https://github.com/google/gson/blob/master/CHANGELOG.md) - [Commits](google/gson@gson-parent-2.8.7...gson-parent-2.8.8) --- updated-dependencies: - dependency-name: com.google.code.gson:gson dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

build.gradle

@@ -72,7 +72,7 @@ dependencies {
  strictly "${project.property('selenium.version')}"
  }
  }
- implementation 'com.google.code.gson:gson:2.8.7'
+ implementation 'com.google.code.gson:gson:2.8.8'
  implementation 'org.apache.httpcomponents:httpclient:4.5.13'
  implementation 'cglib:cglib:3.3.0'
  implementation 'commons-validator:commons-validator:1.7'