protobuf 3.9.0.pre2

• benchmark-ips 2.13.0 >= 0

• ffi-rzmq 2.0.7 >= 0

• parser 2.3.0.6 = 2.3.0.6

• pry-byebug 3.10.1 >= 0

• pry-stack_explorer 0.6.1 >= 0

• rake 10.5.0 < 11.0

• rspec 3.13.0 >= 3.0

• rubocop 0.38.0 ~> 0.38.0

• ruby-prof 1.7.0 >= 0

• simplecov 0.22.0 >= 0

• timecop 0.9.8 >= 0

• varint 0.1.1 >= 0

• yard 0.9.36 >= 0