update classes and tests to be compatible with new omnipay packages

[digibeuk]

in line with the version numbers used bij omnipay I would suggest we make this available as the 3.0 branch.

~The minimum requirement for the package is also from now on php 7.1.~

See also : https://github.com/thephpleague/omnipay-common/releases/tag/v3.0.0

This should be throroughly tested.

[Feijs]

in line with the version numbers used bij omnipay I would suggest we make this available as the 3.0 branch

Should it be merged to master then? If that is that case, a 1.0 branch should be made from the current master, so we can create updates and fixes untill the 3.0 branch is releasable and the transition to php ^7.1 has been made.

Alternatively, I would suggest creating a 3.0 branch from master and directing this PR there

[digibeuk]

Should it be merged to master then? If that is that case, a 1.0 branch should be made from the current master, so we can create updates and fixes untill the 3.0 branch is releasable and the transition to php ^7.1 has been made.

Alternatively, I would suggest creating a 3.0 branch from master and directing this PR there :+1:

[mattias-persson]

Is this still considered a WIP or is it ready to be merged?

[Feijs]

Is this still considered a WIP or is it ready to be merged?

Looks like there are still a few unaddressed/unanswered questions, nor do I think it has been sufficiently tested in practice (at least not by me). So I would consider this WIP still.

The author is currently unavailable, but I'm sure he can provide an update upon his return. And I'll do some testing in the meantime.

[digibeuk]

Is this still considered a WIP or is it ready to be merged?

@mattias-persson it is still a WIP at the moment I am trying to find some time to get back at the task.