Merge pull request #11 from igorkosteski/master - Complete the ThreePartyRefundRequest

Merge pull request #7 from lucasnetau/sha256-fix Skip vpc_SecureHash and vpc_SecureHashType params in SHA256 Hash Calculation

Merge pull request #2 from khaledkhamis/master added migs refund support

Update .travis.yml 

PSR-4 

Update dependencies