Automated: Bump gem version to 0.12.7 for future releases. (#490)

Author: stackdriver-instrumentation-release

fluent-plugin-google-cloud.gemspec

@@ -10,7 +10,7 @@ eos
   gem.homepage      =
     'https://github.com/GoogleCloudPlatform/fluent-plugin-google-cloud'
   gem.license       = 'Apache-2.0'
-  gem.version       = '0.12.6'
+  gem.version       = '0.12.7'
   gem.authors       = ['Stackdriver Agents Team']
   gem.email         = ['[email protected]']
   gem.required_ruby_version = Gem::Requirement.new('>= 2.2')