Release Notes for Cppcheck 2.14

New checks:
-

Improved checking:
-

GUI:
-

Changed interface:
-

Deprecations:
-

Other:
- Added CMake option 'EXTERNALS_AS_SYSTEM' to treat external includes as 'SYSTEM' ones.
- The minimum required compiler versions have been bumped to GCC 5.1 / Clang 3.5 / Visual Studio 2015
- The minimum required CMake version has been bumped to 3.5
- Using Visual Studio with CMake now checks if the CMake version is at least 3.13. This was always required but was not checked explicitly.