Add Luminor Gateway driver (thephpleague#639)

Author: DeH4eG

README.md

@@ -173,6 +173,7 @@ Gateway | 2.x | 3.x | Composer Package | Maintainer
 [Judo Pay](https://github.com/Transportersio/omnipay-judopay) | ✓ | - | transportersio/omnipay-judopay | [Transporters.io](https://github.com/Transportersio)
 [Klarna Checkout](https://github.com/MyOnlineStore/omnipay-klarna-checkout) | ✓ | ✓ | myonlinestore/omnipay-klarna-checkout | [MyOnlineStore](https://github.com/MyOnlineStore)
 [Laybuy](https://github.com/mediabeastnz/omnipay-laybuy) | ✓ | - | mediabeastnz/omnipay-laybuy | [Myles Derham](https://github.com/mediabeastnz)
+[Luminor Gateway](https://github.com/DeH4eG/omnipay-luminor) | - | ✓ | deh4eg/omnipay-luminor | [Denis Smolakov](https://github.com/DeH4eG)
 [Komerci (Rede, former RedeCard)](https://github.com/byjg/omnipay-komerci) | ✓ | - | byjg/omnipay-komerci | [João Gilberto Magalhães](https://github.com/byjg)
 [Komoju](https://github.com/dannyvink/omnipay-komoju) | ✓ | - | vink/omnipay-komoju | [Danny Vink](https://github.com/dannyvink)
 [Midtrans](https://github.com/dilab/omnipay-midtrans) | ✓ | ✓ | dilab/omnipay-midtrans | [Xu Ding](https://github.com/dilab)