Update ruby and bundler versions

Author: rikas

.ruby-version

@@ -1 +1 @@
-2.6.6
+3.1.2

ios-devices.gemspec

@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ['lib']
 
-  spec.add_development_dependency 'bundler', '~> 2.3.10'
+  spec.add_development_dependency 'bundler', '~> 2.4.7'
   spec.add_development_dependency 'rake', '~> 13.0.6'
   spec.add_development_dependency 'pry'
   spec.add_development_dependency 'rspec'