Update ruby-grape-danger requirement from ~> 0.1.1 to ~> 0.2.0

Updates the requirements on [ruby-grape-danger](https://github.com/ruby-grape/danger) to permit the latest version.
- [Release notes](https://github.com/ruby-grape/danger/releases)
- [Changelog](https://github.com/ruby-grape/danger/blob/master/CHANGELOG.md)
- [Commits](ruby-grape/danger@v0.1.1...v0.2.0)

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

Gemfile

@@ -15,6 +15,6 @@ group :test do
   gem 'guard-bundler'
   gem 'guard-rspec'
   gem 'rb-fsevent'
-  gem 'ruby-grape-danger', '~> 0.1.1', require: false
+  gem 'ruby-grape-danger', '~> 0.2.0', require: false
   gem 'simplecov', require: false
 end