Cppcheck-1.81

Cppcheck-1.81 has been released

CPPCHECK:
* New warning: Check if condition after an early return is overlapping and therefore always false.
* Improved knowledge about C/C++ standard, windows, posix, wxwidgets, gnu
* Better handling of Visual Studio projects

GUI:
* Compile: Qt5 is now needed to build the GUI
* Compile: New qmake flag HAVE_QCHART
* Project: You can now run cppcheck-addons
* Project: We have integrated clang-tidy
* Results view: Reload last results (if cppcheck build dir is used) when GUI is started
* Results view: Tag the warnings with custom keywords (bug/todo/not important/etc..)
* Results view: Shows when warning first appeared (since date)
* Results view: Suppress warnings through right-click menu
* Statistics: Added charts (shown if Qt charts module is enabled during build)