Find KI18N in CMake, required for k18n_wrap_ui:

CMake Error at src/kcm/CMakeLists.txt:7 (ki18n_wrap_ui):
  Unknown CMake command "ki18n_wrap_ui".

The above error gets fixed with this patch.

CMakeLists.txt

@@ -37,6 +37,7 @@ set(QT_REQUIRED_VERSION "5.6.0")
 find_package(Qt5 ${QT_REQUIRED_VERSION} CONFIG REQUIRED Widgets Test WebEngine WebEngineWidgets)
 ########### Find packages ###########
 find_package(KF5KIO ${KF5_VERSION} CONFIG REQUIRED)
+find_package(KF5I18n ${KF5_VERSION} CONFIG REQUIRED)
 find_package(KF5Completion ${KF5_VERSION} CONFIG REQUIRED)
 find_package(KF5Codecs ${KF5_VERSION} CONFIG REQUIRED)
 find_package(Grantlee5 "5.1" CONFIG REQUIRED)