Notifications on event update

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon_web/views/email_view.ex

@@ -1,3 +1,10 @@
 defmodule MobilizonWeb.EmailView do
   use MobilizonWeb, :view
+
+  def datetime_to_string(%DateTime{} = datetime, locale \\ "en") do
+    with {:ok, string} <-
+           Cldr.DateTime.to_string(datetime, Mobilizon.Cldr, format: :medium, locale: locale) do
+      string
+    end
+  end
 end