Add attachment_reminder localizations to Transifex

.tx/config

@@ -23,6 +23,11 @@ file_filter = plugins/archive/localization/<lang>.inc
 source_file = plugins/archive/localization/en_US.inc
 source_lang = en_US
 
+[roundcube-webmail.plugin-attachment_reminder]
+file_filter = plugins/attachment_reminder/localization/<lang>.inc
+source_file = plugins/attachment_reminder/localization/en_US.inc
+source_lang = en_US
+
 [roundcube-webmail.plugin-help]
 file_filter = plugins/help/localization/<lang>.inc
 source_file = plugins/help/localization/en_US.inc