2.1.0

Added

• File changelog.
• Add HasGift trait.
• Added status column to the transfers table.
• Added status_last column to the transfers table.
• Added methods: refundGift, safeRefundGift, forceRefundGift
• A new argument is added to the "old refund" methods $gifts.

Fixed

• Due to the addition of new functionality gifts
  there are possible problems that need to be addressed.
  Namely, when returning the goods,
  the funds would not be returned to
  the person who paid for it.
  Which would raise a lot of questions.

Changed

• Composer.json: add new keywords.
• the $gifts argument (Boolean type) is added to
  the paid, refund, safeRefund, forceRefund method's.

Removed

• Removed column refund from transfers table.
  Now it has been replaced by the status column.

Full Changelog: 2.0.1...2.1.0