[horde] Horde webmail with PHP7

[Adam Raszkiewicz]

I have installed most recent Horde 5.2.21 on the server with PHP7 but with
the test I'm getting those messages:

PHP Version: 7.0.33
PHP Major Version: 7.0
PHP Minor Version: 33
PHP Version Classification: release
This version of PHP has not been fully tested with this version of Horde.

I thought that Horde supports PHP7 but sounds like is not. Which recent
version of PHP7 is supported then?

Thanks,
Adam