Adds getSubscriptionEndDate function
Adds getSubscriptionEndDate function

Adds public getSubscriptionEndDate function in order to get the date the subscription will renew at to show subscribers on their billing info page.
lucasmichot/cashier,laravel/cashier,jurihub/cashier,DougSisk/laravel-cashier,rained23/cashier,kyranb/cashier,kyranb/cashier,phroggyy/cashier,DougSisk/laravel-cashier,5outh/cashier,readybytes/cashier,5outh/cashier,readybytes/cashier,laravel/cashier,rained23/cashier,ryross/cashier,phroggyy/cashier,beeseenmedia/cashier,mpociot/cashier,ryross/cashier,lucasmichot/cashier,jurihub/cashier,ryross/cashier,mpociot/cashier,beeseenmedia/cashier