Added first non SEPA countries

lib/iban_ex/country/pk.ex

@@ -0,0 +1,25 @@
+defmodule IbanEx.Country.PK do
+  @moduledoc """
+  Pakistan IBAN parsing rules
+
+  ## Examples
+
+  ```elixir
+      iex>  %IbanEx.Iban{
+      ...>    country_code: "PK",
+      ...>    check_digits: "36",
+      ...>    bank_code: "SCBL",
+      ...>    branch_code: nil,
+      ...>    national_check: nil,
+      ...>    account_number: "0000001123456702"
+      ...>  }
+      ...>  |> IbanEx.Country.PK.to_string()
+      "PK 36 SCBL 0000001123456702"
+  ```
+  """
+
+  @size 24
+  @rule ~r/^(?<bank_code>[A-Z]{4})(?<account_number>[0-9]{16})$/i
+
+  use IbanEx.Country.Template
+end