Merge pull request #22 from mnwalker/master

Allow Guzzle 7 support

Update composer.json

WIP: Allow for creation of recurring and adhoc subscriptions (#15)

* WIP: Start work on getting subscription billing working

* When creating an adhoc subscription don't pass recurring settings over

* [security] Don't send over the passphrase as part of the request as it allows bad actors to change the amount being billed, etc.

* Reorder and make notes.  Email confirmation needs to be after the custom_xxx items

Merge pull request #14 from jacques/master

Fix for ITN support with using a passphrase configured via the PayFast website

Merge pull request #2 from flowcomm/patch-1

Update CompletePurchasePdtResponse.php

Update .travis.yml

PSR-4

Update dependencies