Release 1.1.0

• Fix issue expire time when overtime
• Fix can purchase greater than 1 membership product qty when change qty in cart page
• Add validate greater than zero when set "Length" field
• Add message to "My Membership" page when customer is not membership yet
• Add function to change customer group when change expire time in backend
• Add function to sell membership products in backend
• Add support PHP 7.2
• Compatible with Magento 2.3
• Improved performance
• Bug fixes