minimize dependency list

to compile the translations (which is all what CI does) we need only a
minimal build of linguist.

Change-Id: Ide0a2c0a4dd3890054dbb00b01d5c2835615ff88
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Update German translations for 5.2

Change-Id: I7db15acdc4c01b162770d8d10368d24830f848ae
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Bump MODULE_VERSION to 5.2.0

Change-Id: I9c39520822c6bc7ba004eb48127cda3ba26bc6d8
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>