Prepare build system for building against qt6

CMakeLists.txt

@@ -4,8 +4,8 @@ project(plasma-browser-integration)
 set(PROJECT_VERSION "5.24.80")
 set(PROJECT_VERSION_MAJOR 5)
 
-set(QT_MIN_VERSION "5.9.0")
-set(KF5_MIN_VERSION "5.81.0")
+set(QT_MIN_VERSION "5.15.0")
+set(KF5_MIN_VERSION "5.90.0")
 
 find_package(ECM ${KF5_MIN_VERSION} REQUIRED NO_MODULE)
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} )
@@ -17,7 +17,7 @@ include(FeatureSummary)
 include(KDEClangFormat)
 include(KDEGitCommitHooks)
 
-find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS
+find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS
 Gui
 DBus
 Widgets

reminder/CMakeLists.txt

@@ -20,4 +20,4 @@ target_link_libraries(browserintegrationreminder
     KF5::KIOGui # for KIO::ApplicationLauncherJob
 )
 
-install(TARGETS browserintegrationreminder  DESTINATION ${KDE_INSTALL_PLUGINDIR}/kf5/kded)
+install(TARGETS browserintegrationreminder  DESTINATION ${KDE_INSTALL_PLUGINDIR}/kf${QT_MAJOR_VERSION}/kded)