style(rubocop): fix all safe auto correctable offenses

app/models/domain/dns_verification.rb

@@ -1,4 +1,4 @@
-require 'resolv'
+require "resolv"
 
 class Domain
 
@@ -7,11 +7,12 @@ class Domain
   end
 
   def verify_with_dns
-    return false unless self.verification_method == 'DNS'
-    result = resolver.getresources(self.name, Resolv::DNS::Resource::IN::TXT)
-    if result.map { |d| d.data.to_s.strip}.include?(self.dns_verification_string)
+    return false unless verification_method == "DNS"
+
+    result = resolver.getresources(name, Resolv::DNS::Resource::IN::TXT)
+    if result.map { |d| d.data.to_s.strip }.include?(dns_verification_string)
       self.verified_at = Time.now
-      self.save
+      save
     else
       false
     end