Merge branch 'develop' into feature/mpi

packages/CLI11/include/CLI/App.hpp

packages/CLI11/include/CLI/Config.hpp

packages/CLI11/include/CLI/ConfigFwd.hpp

packages/CLI11/include/CLI/Formatter.hpp

packages/CLI11/include/CLI/FormatterFwd.hpp

packages/CLI11/include/CLI/Macros.hpp

packages/CLI11/include/CLI/Option.hpp

packages/CLI11/include/CLI/Optional.hpp

packages/CLI11/include/CLI/StringTools.hpp

packages/CLI11/include/CLI/Timer.hpp

packages/CLI11/include/CLI/TypeTools.hpp

packages/CLI11/include/CLI/Validators.hpp

packages/CLI11/include/CLI/Version.hpp

packages/CLI11/scripts/MakeSingleHeader.py

packages/CLI11/tests/AppTest.cpp

packages/CLI11/tests/CMakeLists.txt

packages/CLI11/tests/CreationTest.cpp

packages/CLI11/tests/DeprecatedTest.cpp

packages/CLI11/tests/HelpTest.cpp

packages/CLI11/tests/IniTest.cpp