Added all SEPA countries (IBANs from European Union countries) and minimal test coverage for countries

lib/iban_ex/country/li.ex

@@ -0,0 +1,17 @@
+defmodule IbanEx.Country.LI do
+  @moduledoc """
+  Liechtenstein IBAN parsing rules
+
+  ## Examples
+
+    iex> %IbanEx.Iban{country_code: "LI", check_digits: "21", bank_code: "08810", branch_code: nil, national_check: nil, account_number: "0002324013AA"}
+    iex> |> IbanEx.Country.LI.to_string()
+    "LI 21 08810 0002324013AA"
+
+  """
+
+  @size 21
+  @rule ~r/^(?<bank_code>[0-9]{5})(?<account_number>[0-9A-Z]{12})$/i
+
+  use IbanEx.Country.Template
+end