chore: move rexml to development dependencies

Author: crawlbase

crawlbase.gemspec

@@ -24,10 +24,9 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "rexml"
-
   spec.add_development_dependency "rspec", "~> 3.2"
   spec.add_development_dependency "webmock", "~> 3.4"
   spec.add_development_dependency "bundler", "~> 2.0"
   spec.add_development_dependency "rake", "~> 12.3.3"
+  spec.add_development_dependency "rexml", "~> 3.2"
 end