style(rubocop): Lint/MissingSuper

app/models/concerns/has_authentication.rb

@@ -49,6 +49,7 @@ class Postal::Errors::AuthenticationError < Postal::Error
   attr_reader :error
 
   def initialize(error)
+    super()
     @error = error
   end
 

config/initializers/mail_extensions.rb

@@ -111,6 +111,7 @@ module Mail
   # Handle attached emails as attachments
   class AttachmentsList < Array
 
+    # rubocop:disable Lint/MissingSuper
     def initialize(parts_list)
       @parts_list = parts_list
       @content_disposition_type = "attachment"
@@ -119,6 +120,7 @@ module Mail
       end.flatten.compact.each { |a| self << a }
       self
     end
+    # rubocop:enable Lint/MissingSuper
 
   end
 

lib/postal/http_sender.rb

@@ -4,6 +4,7 @@ module Postal
   class HTTPSender < Sender
 
     def initialize(endpoint, options = {})
+      super()
       @endpoint = endpoint
       @options = options
       @log_id = Nifty::Utils::RandomString.generate(length: 8).upcase

lib/postal/smtp_sender.rb

@@ -6,6 +6,7 @@ module Postal
   class SMTPSender < Sender
 
     def initialize(domain, source_ip_address, options = {})
+      super()
       @domain = domain
       @source_ip_address = source_ip_address
       @options = options