April updates

System updates:

• API 2.0
• Customer base filters and segments
• Added ability to connect Customer Portal from Stripe
• Added charting for map section stats
• Added new languages
• Interface changes

Bugfixes:

• Fixed statistics for the "Coupon" card
• Fixed the statistics for the referral program in the template section
• Fixed the display of card end dates on PWA
• Fixed deleted cardholder recovery process
• Fixed UTM link creation if such name was used before