Time to increase version + use target support

CMakeLists.txt

-cmake_minimum_required (VERSION 3.5 FATAL_ERROR)
+cmake_minimum_required (VERSION 3.16 FATAL_ERROR)
 
 # KDE Application Version, managed by release script
 set(RELEASE_SERVICE_VERSION_MAJOR "21")
@@ -8,8 +8,8 @@ set(RELEASE_SERVICE_VERSION "${RELEASE_SERVICE_VERSION_MAJOR}.${RELEASE_SERVICE_
 
 project(kcolorchooser VERSION ${RELEASE_SERVICE_VERSION})
 
-set(QT_MIN_VERSION     "5.10.0")
-set(KF5_MIN_VERSION    "5.30.0")
+set(QT_MIN_VERSION     "5.15.0")
+set(KF5_MIN_VERSION    "5.83.0")
 
 find_package(ECM ${KF5_MIN_VERSION} REQUIRED NO_MODULE)
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH})
@@ -32,16 +32,11 @@ find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
 add_definitions(-DQT_NO_URL_CAST_FROM_STRING)
 
 
-if (KF5ConfigWidgets_VERSION VERSION_GREATER "5.56.0")
-        add_definitions(-DQT_NO_FOREACH)
-        MESSAGE(STATUS "compile without foreach")
-endif()
-
 ecm_setup_version(${RELEASE_SERVICE_VERSION} VARIABLE_PREFIX KCOLORCHOOSER VERSION_HEADER kcolorchooser_version.h)
 
-set(kcolorchooser_SRCS kcolorchooser.cpp )
+add_executable(kcolorchooser)
+target_sources(kcolorchooser PRIVATE kcolorchooser.cpp )
 
-add_executable(kcolorchooser ${kcolorchooser_SRCS})
 
 target_link_libraries(kcolorchooser Qt5::Gui KF5::I18n KF5::XmlGui)