Upgrade to Qt6

Author: spoutn1k

Diff for: CMakeLists.txt

@@ -18,7 +18,7 @@ FIND_PACKAGE(fmt REQUIRED)
 FIND_PACKAGE(spdlog REQUIRED)
 FIND_PACKAGE(OpenMP)
 FIND_PACKAGE(GTest)
-FIND_PACKAGE(Qt5 COMPONENTS Widgets LinguistTools)
+FIND_PACKAGE(Qt6 COMPONENTS Widgets LinguistTools)
 FIND_PACKAGE(Git)
 
 IF (Git_FOUND)

Diff for: src/graphical/CMakeLists.txt

@@ -1,6 +1,6 @@
 SET(CMAKE_INCLUDE_CURRENT_DIR ON)
 
-IF(Qt5_FOUND)
+IF(Qt6_FOUND)
     SET(CMAKE_AUTOUIC ON)
     SET(CMAKE_AUTOMOC ON)
     SET(CMAKE_AUTORCC ON)
@@ -33,7 +33,7 @@ IF(Qt5_FOUND)
 
     TARGET_LINK_LIBRARIES(mcmap-gui
         PRIVATE
-        Qt5::Widgets
+        Qt6::Widgets
         ZLIB::ZLIB
         PNG::PNG
         fmt::fmt-header-only