Gemfile
source "https://rubygems.org"
git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
# Specify your gem's dependencies in cure_line.gemspec
gemspec
if Gem::Version.create(RUBY_VERSION) < Gem::Version.create("2.7.0")
# term-ansicolor 1.9.0+ doesn't work on Ruby < 2.7
gem "term-ansicolor", "< 1.9.0"
end