Translation plugin

Hi @onesignal, thank you for the plugin!

I’d like to translate it into Russian, but it’s not properly prepared for localization, see the warning on the plugin page in GlotPress:
https://translate.ww.wp.xz.cn/projects/wp-plugins/onesignal-free-web-push-notifications

ERROR: Unable to find or access php files in https://plugins.svn.ww.wp.xz.cn/onesignal-free-web-push-notifications/tags/1.16.8/

Could you please fix this to prepare the plugin for localization? Thanks!