Test builds against PHP 7
Test builds against PHP 7

Add (hacky) way of testing builds against the development version of PHP 7
pierredup/SolidInvoice,CSBill/CSBill,pierredup/CSBill,pierredup/CSBill,pierredup/SolidInvoice,CSBill/CSBill,SolidInvoice/SolidInvoice,pierredup/CSBill,pierredup/CSBill,CSBill/CSBill,SolidInvoice/SolidInvoice,CSBill/CSBill,SolidInvoice/SolidInvoice