Update packages to support Laravel 6

[tomhatzer]

Hi there!

• Updated illuminate/support to include version ^6.0
• Updated orchestra/database to include version ^4.0
• Updated orchestra/testbench to inlcude version ^4.0
• Removed predis/predis as it was not used anywhere in the package

@Sparclex would be nice if you could merge and tag this, so we can continue using your package. 😃

Thank you very much!

Best wishes Tom

[Sparclex]

Thanks a lot for the PR :) sorry did not have time to look at it earlier

[gldrenthe89]

Hi. can you please release this? thanks