WooCommerce Smart Coupons 8.20.1

* New: Setting to allow combining of coupons emails when multiple emails are sent to the same recipient
* New: Restrict Coupons by User Roles
* Fix: Store Credit's amount not decreasing even after applying the discount on the renewal order [WooCommerce Subscriptions]
* Update: POT file

* Fix: Not showing coupon receiver detail form under checkout section [WooCommerce One Page Checkout] IS#84
* Fix: Display of gift card amount in summary of the linked coupons when setting 'Sell store credit at less price' is enabled
* Fix: Duplicate coupon showing on cart, checkout & my account page
* Update: Updated code as per the latest version of WordPress Standard
* Update: Prevent unnecessary loading of some JavaScript code
* Update: Prevent unnecessary database call for options 'wc_sc_coupon_code_length', 'sc_store_credit_singular_text', 'sc_store_credit_plural_text', 'sa_cbl_additional_locations'
* Update: jQuery improvements related to deprecated functions, replaced '.live' with '.on'
* Update: Make the word 'Now' & 'Later' translatable
* Update: POT file

* Fix: Unable to create/auto-generate coupons that are having some actions but the amount field is either zero or empty
* Fix: Use Action Schedulers only when required to speed up bulk generate process when small number of coupons has to be processed
* Update: Make the word 'Now' & 'Later' translatable
* Update: Show admin notice when upload directory is not writable to avoid empty coupon codes generation.
* Update: POT file