tugboat 4.0.0

• aruba 0.8.1 = 0.8.1

• coveralls 0.7.2 = 0.7.2

• cucumber 2.4.0 = 2.4.0

• github_changelog_generator 1.16.4 >= 0

• license_finder 3.0.0 = 3.0.0

• pry 0.10.4 = 0.10.4

• rake 12.0.0 = 12.0.0

• rb-readline 0.5.4 = 0.5.4

• rspec-core 3.6.0 = 3.6

• rspec-expectations 3.6.0 = 3.6

• rspec-mocks 3.6.0 = 3.6

• rubocop 0.49.1 = 0.49.1

• rubocop-rspec 1.15.1 = 1.15.1

• simplecov 0.14.1 = 0.14.1

• simplecov-console 0.4.2 = 0.4.2

• vcr 3.0.3 = 3.0.3

• webmock 3.0.1 = 3.0.1