checkoff 0.31.0

• bump 0.10.0 >= 0

• bundler 2.6.4 >= 0

• fakeweb 1.3.0 >= 0

• mdl 0.13.0 >= 0

• minitest-profile 0.0.2 >= 0

• minitest-reporters 1.7.1 >= 0

• mocha 2.0.4 ~> 2.0.0.alpha.1

• overcommit 0.60.0 >= 0.60.0, < 0.61.0

• pry 0.15.2 >= 0

• rake 13.2.1 ~> 13.0

• rspec 3.13.0 >= 3.4

• rubocop 1.43.0 ~> 1.36, < 1.44

• rubocop-minitest 0.37.1 >= 0

• rubocop-rake 0.7.1 >= 0

• simplecov 0.22.0 >= 0.18.0

• simplecov-lcov 0.8.0 >= 0

• undercover 0.6.3 >= 0

• webmock 3.25.0 >= 0