feat: change cep word by zipcode

lib/brazil_cep/adapters/postmon.rb

@@ -12,7 +12,7 @@ class Postmon < Base
 
         def transformation!
           address_params = {
-            cep: @payload[:cep],
+            zipcode: @payload[:cep],
             state: @payload[:estado],
             city: @payload[:cidade],
             neighborhood: @payload[:bairro],

lib/brazil_cep/adapters/republica_virtual.rb

@@ -12,7 +12,7 @@ class RepublicaVirtual < Base
 
         def transformation!
           address_params = {
-            cep: @cep,
+            zipcode: @cep,
             state: @payload[:uf],
             city: @payload[:cidade],
             neighborhood: @payload[:bairro],

lib/brazil_cep/adapters/viacep.rb

@@ -12,7 +12,7 @@ class Viacep < Base
 
         def transformation!
           address_params = {
-            cep: @payload[:cep],
+            zipcode: @payload[:cep],
             state: @payload[:uf],
             city: @payload[:localidade],
             neighborhood: @payload[:bairro],

lib/brazil_cep/address.rb

@@ -4,10 +4,10 @@ module Brazil
   module Cep
     # Address class
     class Address
-      attr_reader :cep, :state, :city, :neighborhood, :street, :complement, :meta
+      attr_reader :zipcode, :state, :city, :neighborhood, :street, :complement, :meta
 
       def initialize(**arguments)
-        @cep = arguments[:cep]
+        @zipcode = arguments[:zipcode]
         @state = arguments[:state]
         @city = arguments[:city]
         @neighborhood = arguments[:neighborhood]

spec/brazil_cep/address_spec.rb

@@ -1,11 +1,13 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 RSpec.describe Brazil::Cep::Address do
   subject(:address) { described_class.new(**address_params) }
 
   let(:address_params) do
     {
-      cep: "01311-100",
+      zipcode: "01311-100",
       street: "Avenida Paulista",
       state: "SP",
       city: "São Paulo",
@@ -27,7 +29,7 @@
     }
   end
 
-  it { expect(address.cep).to eq("01311-100") }
+  it { expect(address.zipcode).to eq("01311-100") }
   it { expect(address.street).to eq("Avenida Paulista") }
   it { expect(address.state).to eq("SP") }
   it { expect(address.city).to eq("São Paulo") }