Merge branch 'develop' into feature/mpi

packages/CLI11/tests/NewParseTest.cpp

packages/CLI11/tests/OptionalTest.cpp

packages/CLI11/tests/SubcommandTest.cpp

packages/CLI11/tests/WindowsTest.cpp

packages/CLI11/tests/link_test_2.cpp

packages/Catch2/.gitattributes

packages/Catch2/.gitrepo

packages/Catch2/.travis.yml

packages/Catch2/CMake/Catch2Config.cmake.in

packages/Catch2/CMake/MiscFunctions.cmake

packages/Catch2/CMake/catch2.pc.in

packages/Catch2/CMakeLists.txt

packages/Catch2/README.md

packages/Catch2/appveyor.yml

packages/Catch2/conanfile.py

packages/Catch2/contrib/ParseAndAddCatchTests.cmake

packages/Catch2/docs/Readme.md

packages/Catch2/docs/assertions.md

packages/Catch2/docs/ci-and-misc.md

packages/Catch2/docs/cmake-integration.md