fix: change expgen to a runtime dependency

Author: bethesque

pact-support.gemspec

@@ -22,8 +22,8 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "term-ansicolor", "~> 1.0"
   spec.add_runtime_dependency "awesome_print", "~> 1.9"
   spec.add_runtime_dependency "diff-lcs", "~> 1.4"
+  spec.add_runtime_dependency "expgen", "~> 0.1"
 
-  spec.add_development_dependency 'expgen', '~> 0.1.1'
   spec.add_development_dependency "rspec", ">= 2.14", "< 4.0"
   spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "webmock", "~> 3.3"