Update gems and ruby

Author: route

cuprite.gemspec

@@ -22,18 +22,18 @@ Gem::Specification.new do |s|
     "source_code_uri" => "https://github.com/rubycdp/cuprite",
   }
 
-  s.required_ruby_version = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.5.0"
 
   s.add_runtime_dependency "capybara", ">= 2.1", "< 4"
   s.add_runtime_dependency "ferrum",   "~> 0.11.0"
 
-  s.add_development_dependency "image_size", "~> 2.0"
-  s.add_development_dependency "pdf-reader", "~> 2.1"
-  s.add_development_dependency "rake",       "~> 12.3"
-  s.add_development_dependency "rspec",      "~> 3.7"
-  s.add_development_dependency "sinatra",    "~> 2.0"
-  s.add_development_dependency "launchy",    "~> 2.4"
-  s.add_development_dependency "byebug",     "~> 10.0"
-  s.add_development_dependency "puma",       "~> 3.0"
-  s.add_development_dependency "chunky_png", "~> 1.3"
+  s.add_development_dependency "image_size", "~> 3.0"
+  s.add_development_dependency "pdf-reader", "~> 2.5"
+  s.add_development_dependency "rake",       "~> 13.0"
+  s.add_development_dependency "rspec",      "~> 3.10"
+  s.add_development_dependency "sinatra",    "~> 2.1"
+  s.add_development_dependency "launchy",    "~> 2.5"
+  s.add_development_dependency "byebug",     "~> 11.1"
+  s.add_development_dependency "puma",       "~> 4.3"
+  s.add_development_dependency "chunky_png", "~> 1.4"
 end