[horde] H4 to H5 upgrade

[Jānis]

Hi!

Is there the procedure for direct upgrade of H4 framework modules and  
apps to H5?

simple attempt to pear upgrade led to numerous errors like

horde/horde cannot be installed, conflicts with installed packages
horde/imp requires package "horde/horde" (version >= 5.0.0, version <=  
6.0.0alpha1, excluded versions: 6.0.0alpha1), installed version is  
4.0.15
horde/imp requires package "horde/Horde_Text_Filter_Csstidy" (version  
 >= 2.0.0, version <= 3.0.0alpha1, excluded versions: 3.0.0alpha1),  
installed version is 1.0.1
horde/ingo requires package "horde/horde" (version >= 5.0.0, version  
<= 6.0.0alpha1, excluded versions: 6.0.0alpha1), installed version is  
4.0.15

etc

Janis