Use centralized cmake version

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit b2e6bdba6c)

CMakeLists.txt

@@ -9,9 +9,21 @@
 #
 #################################################
 
-## Polkit TQt Library
+
+##### set project version ########################
+
+include( TDEVersion )
+cmake_minimum_required( VERSION ${TDE_CMAKE_MINIMUM_VERSION} )
+tde_set_project_version( )
+
+
+##### general package setup #####################
+
 project("polkit-tqt")
 
+
+##### include essential cmake modules ###########
+
 set(POLKIT-TQT_VERSION_MAJOR 0)
 set(POLKIT-TQT_VERSION_MINOR 103)
 set(POLKIT-TQT_VERSION_PATCH 0)
@@ -21,8 +33,6 @@ set(POLKIT-TQT_VERSION_STRING
 
 ##### cmake setup ###############################
 
-cmake_minimum_required( VERSION 3.5 )
-
 include( FindPkgConfig )
 include( CheckCXXSourceCompiles )
 include( CheckSymbolExists )
@@ -31,11 +41,6 @@ include( TDEMacros )
 enable_testing( )
 
 
-##### set version number ########################
-
-tde_set_project_version( )
-
-
 ##### optional stuff
 
 option( WITH_ALL_OPTIONS "Enable all optional support" OFF )