marc.gemspec in marc-1.2.0 vs marc.gemspec in marc-1.3.0

@@ -6,18 +6,23 @@
   s.author = "Ed Summers"
   s.email = "[e-mail]"
   s.homepage = "https://github.com/ruby-marc/ruby-marc/"
   s.summary = "A ruby library for working with Machine Readable Cataloging"
   s.license = "MIT"
-  s.required_ruby_version = ">= 1.8.6"
+  s.required_ruby_version = ">= 2.2.0"
   s.authors = ["Kevin Clarke", "Bill Dueber", "William Groppe", "Jonathan Rochkind", "Ross Singer", "Ed Summers", "Chris Beer"]
 
   s.files = `git ls-files -z`.split("\x0")
   s.executables = s.files.grep(%r{^bin/}) { |f| File.basename(f) }
   s.test_files = s.files.grep(%r{^(test|spec|features)/})
   s.require_paths = ["lib"]
 
+  s.add_dependency "nokogiri", "~>1.0"
+
+  s.add_development_dependency "rake", "~>13.0"
+  s.add_development_dependency "test-unit", "~>3.0"
   s.add_development_dependency "standard", "~>1.0"
-  s.add_dependency "scrub_rb", ">= 1.0.1", "< 2" # backport for ruby 2.1 String#scrub
-  s.add_dependency "unf" # unicode normalization
+  s.add_development_dependency "warning", "~>1.5"
+  s.add_development_dependency "xml-simple"
+
   s.add_dependency "rexml" # rexml was unbundled from the stdlib in ruby 3
 end