asciidoctor-iso.gemspec in asciidoctor-iso-0.9.9 vs asciidoctor-iso.gemspec in asciidoctor-iso-0.10.0

@@ -23,19 +23,19 @@
 
   spec.bindir        = "bin"
   spec.require_paths = ["lib"]
   spec.files         = `git ls-files`.split("\n")
   spec.test_files    = `git ls-files -- {spec}/*`.split("\n")
-  spec.required_ruby_version = Gem::Requirement.new(">= 2.4.0")
+  spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
 
   spec.add_dependency "asciidoctor", "~> 1.5.7"
   spec.add_dependency "ruby-jing"
   spec.add_dependency "isodoc", ">= 0.8"
-  spec.add_dependency "iev", "~> 0.1.0"
+  spec.add_dependency "iev", "~> 0.2.0"
   spec.add_dependency "relaton", "~> 0.1.3"
 
   spec.add_development_dependency "bundler", "~> 1.15"
-  spec.add_development_dependency "byebug", "~> 9.1"
+  spec.add_development_dependency "byebug"
   spec.add_development_dependency "equivalent-xml", "~> 0.6"
   spec.add_development_dependency "guard", "~> 2.14"
   spec.add_development_dependency "guard-rspec", "~> 4.7"
   spec.add_development_dependency "rake", "~> 12.0"
   spec.add_development_dependency "rspec", "~> 3.6"