build(network): upgarde bundler to 2.2.10+

management/azure_mgmt_network/azure_mgmt_network.gemspec

@@ -33,7 +33,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 2.0.0'
 
-  spec.add_development_dependency 'bundler', '~> 1.9'
+  spec.add_development_dependency 'bundler', '~> 2.2.10'
   spec.add_development_dependency 'rake', '~> 10'
   spec.add_development_dependency 'rspec', '~> 3'
   spec.add_development_dependency 'dotenv', '~> 2'