The "Catch2 without default main" target is currently unspecified in
Conan, and defaults to catch2::catch2base. This commit switches it back
to Catch2::Catch2, as specified in the docs.

The Catch libraries have different API/ABI depending on the c++
standard they are compiled with. For example, the following function
isn't in the binary when compiled with C++14, only with C++17 or later:

StringMaker<std::string_view>::convert(std::string_view str);

By default, Conan is allowed to serve Catch libraries compiled in C++14
into a project using C++17/20, potentially causing linker errors
because of missing symbols. This PR overrides this default behaviour:
the C++ standard of the Catch library will exactly match the one of
the requiring project (building Catch from source if necessary).

* Improve Conan recipe support
* export files
* supports c++14
* update Conan client in the CI
* Better compatibility with Conan 1.x
* Manage options and cppstd for Conan 1.x
* copy eveything from extra


Signed-off-by: Uilian Ries <uilianries@gmail.com>

This requires Conan v1 in version 1.53.0 or greater, but that
should not pose a problem in practice.

* Removed Conan1 build.py file using conan package tools that are no longer supported

* Working conan 1 and 2 build with the test package. 

updated the test_package to be updated to conan 2 and fixed missing cmake. Still need to check that the license file is packaged up and that the packages look identical before the changes

* Removing debug prints and the license check that isn't working yet

* Working license file copied over as it was before

* Migrated the properties of cpp_info to conan 2. Keeping conan 1 support by checking the version of conan

https://docs.conan.io/1/migrating_to_2.0/properties.html

* Revert "Removed Conan1 build.py file using conan package tools that are no longer supported"

This reverts commit a606d1dfe6e118199be8a371403717e3e42ad5da.

* Need to add a set_version to parse the version from CMakeLists.txt

Adding a package build yaml to ensure conan keeps building on 1 and 2

* Setting lowercase catch2 for pkg_config and cmake_target_name

* Fixing the namespace for conan file cmake_target_name

Fixes #2347