Version 0.50.0 of rubocop alerts for offenses

[aeden]

.rubocop_dnsimple.yml: Style/PredicateName has the wrong namespace - should be Naming
Inspecting 98 files
.W..........................C....................W.W.....W........................................

Offenses:

Rakefile:27:19: W: Avoid rescuing without specifying an error class.
    rm_r "yardoc" rescue nil
                  ^^^^^^
lib/dnsimple/client.rb:64:25: C: Use each_key instead of keys.each.
      Dnsimple::Default.keys.each do |key|
                        ^^^^^^^^^
lib/dnsimple/struct/extended_attribute.rb:34:7: W: Method Dnsimple::Struct::ExtendedAttribute#options= is defined at both lib/dnsimple/struct/extended_attribute.rb:27 and lib/dnsimple/struct/extended_attribute.rb:34.
      def options=(opts)
      ^^^
lib/dnsimple/struct/service.rb:55:7: W: Method Dnsimple::Struct::Service#settings= is defined at both lib/dnsimple/struct/service.rb:48 and lib/dnsimple/struct/service.rb:55.
      def settings=(settings)
      ^^^
lib/dnsimple/struct/whoami.rb:16:7: W: Method Dnsimple::Struct::Whoami#account= is defined at both lib/dnsimple/struct/whoami.rb:6 and lib/dnsimple/struct/whoami.rb:16.
      def account=(account)
      ^^^
lib/dnsimple/struct/whoami.rb:24:7: W: Method Dnsimple::Struct::Whoami#user= is defined at both lib/dnsimple/struct/whoami.rb:9 and lib/dnsimple/struct/whoami.rb:24.
      def user=(user)
      ^^^

[AnkurGel]

I think method already defined warnings can be fixed by changing the attribute from attr_accessor to attr_reader since there is customized writer declared for them.
For each_key, rubocop warning should probably figure out that Dnsimple::Default is a module, just because Dnsimple::Default respond to [keys]https://github.com/dnsimple/dnsimple-ruby/blob/master/lib/dnsimple/default.rb#L16) method, it doesn't has to be a hash 😄