Add support for non-empty-array with generics

[mspirkov]

Now this error occurs. It would be great to support types of the form non-empty-array<keyType, valueType>.

[jaapio]

Thanks again, I don't know if you need more changes, but I would like to prevent another burst of releasing.

Maybe you can use the 1.x-dev version to test the new stuff and let me know when everything is done. Or create a new pr when you find more issues. I really appreciate your efforts and improvements. But we should also think about the amount of downloads for this package. The numbers are growing fast again which has impacted on the servers of composer.

[mspirkov]

Yes, I completely agree. I did that. I just unexpectedly found out that this particular type is not supported. I will check again if everything works now and let you know. Thank you!

[mspirkov]

I would like to cover everything at once, but the topic of types is quite extensive, and I can't always consider all possible cases.

[mspirkov]

I found another type that I can add support for. I'll try to do it tomorrow.