fixes

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
Add Gemfile

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
Implement

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
Merge branch 'feature/parallel-ruby-test' into develop