Rename database_version/0 to iana_version/0

lib/compiler.ex

@@ -75,7 +75,7 @@ defmodule Tz.Compiler do
       quote do
         @moduledoc(false)
 
-        def database_version() do
+        def iana_version() do
           unquote(tzdata_version)
         end
       end,

lib/tz.ex

@@ -1,5 +1,5 @@
 defmodule Tz do
   alias Tz.PeriodsProvider
 
-  defdelegate database_version(), to: PeriodsProvider
+  defdelegate iana_version(), to: PeriodsProvider
 end

lib/updater.ex

@@ -14,7 +14,7 @@ defmodule Tz.Updater do
 
     saved_tz_version = get_latest_tz_database()
 
-    if saved_tz_version != PeriodsProvider.database_version() do
+    if saved_tz_version != PeriodsProvider.iana_version() do
       Logger.info("Tz is recompiling time zone periods...")
       Code.compiler_options(ignore_module_conflict: true)
       Compiler.compile()

lib/watch_periodically.ex

@@ -10,7 +10,7 @@ defmodule Tz.WatchPeriodically do
 
     case Updater.fetch_iana_tz_version() do
       {:ok, latest_version} ->
-        if latest_version != PeriodsProvider.database_version() do
+        if latest_version != PeriodsProvider.iana_version() do
           link = "https://data.iana.org/time-zones/releases/tzdata#{latest_version}.tar.gz"
           Logger.warn("Tz found a more recent time zone database available for download at #{link}")
         end

test/time_zone_database_test.exs

@@ -89,6 +89,6 @@ defmodule TimeZoneDatabaseTest do
   end
 
   test "version" do
-    assert "2021a" == Tz.database_version()
+    assert "2021a" == Tz.iana_version()
   end
 end