Update Cucumber to version 7

Author: pirj

cucumber.yml

@@ -1,2 +1,2 @@
-default: --require features --strict --format progress --tags ~@wip features
-wip:     --require features --tags @wip:30 --wip features
+default: --require features --strict --format progress --tags 'not @wip' features --publish-quiet
+wip:     --require features --tags @wip:30 --wip features --publish-quiet

features/support/require_expect_syntax_in_aruba_specs.rb

@@ -1,6 +1,6 @@
 if defined?(Cucumber)
   require 'shellwords'
-  Before('~@with-clean-spec-opts') do
+  Before('not @with-clean-spec-opts') do
     set_environment_variable('SPEC_OPTS', "-r#{Shellwords.escape(__FILE__)}")
   end
 else

rspec-core.gemspec

@@ -44,7 +44,7 @@ Gem::Specification.new do |s|
     s.add_runtime_dependency "rspec-support", "~> #{RSpec::Core::Version::STRING.split('.')[0..1].concat(['3']).join('.')}"
   end
 
-  s.add_development_dependency "cucumber", "~> 3.2.0"
+  s.add_development_dependency 'cucumber', '>= 3.2', '< 8.0.0'
   s.add_development_dependency "minitest", "~> 5.3"
   s.add_development_dependency "aruba",    "~> 0.14.9"