Add deprecation notice for Catch-related items

Author: StableCoder

Diff for: README.md

@@ -321,6 +321,8 @@ The given doxygen file to use/process. (Defaults to'${CMAKE_CURRENT_SOURCE_DIR}/
 
 ## Prepare the Catch Test Framework [`prepare-catch.cmake`](prepare-catch.cmake)
 
+**DEPRECATED**: Catch now has good CMake integration available natively, so this is no longer required and will be dropped in a future release.
+
 The included `prepare_catch` function contained within attempts to add the infrastructure necessary for automatically adding C/C++ tests using the Catch2 library, including either an interface or pre-compiled 'catch' target library.
 
 It first attempts to find the header on the local machine, and failing that, clones the single header variant for use. It does make the determination between pre-C++11 and will use Catch1.X rather than Catch2 (when cloned), automatically or forced.. Adds a subdirectory of tests/ if it exists from the macro's calling location.

Diff for: prepare-catch.cmake

@@ -21,6 +21,9 @@ option(FORCE_CATCH_CLONE
 find_file(HAVE_CATCH_HPP catch.hpp PATH_SUFFIXES catch2 catch)
 mark_as_advanced(FORCE HAVE_CATCH_HPP)
 
+# **DEPRECATED** Catch now has proper CMake integration, and this will be dropped
+# in a future release.
+#
 # Attempts to add the infrastructure necessary for automatically adding C/C++
 # tests using the Catch2 library, including either an interface or pre-compiled
 # 'catch' target library.