Conan support (#156); Catch2 dependency added.

CMakeLists.txt

 set(CMAKE_CXX_EXTENSIONS OFF)
 
 
+include("${CMAKE_BINARY_DIR}/conan_paths.cmake" OPTIONAL)
+
+
 add_library(ScopeGuard INTERFACE)
 target_include_directories(ScopeGuard INTERFACE
                             $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>

conanfile.txt

+[requires]
+Catch2/2.8.0@catchorg/stable
+
+[generators]
+cmake_find_package
+cmake_paths

test/CMakeLists.txt

-
-add_library(Catch INTERFACE)
-target_include_directories(Catch INTERFACE "catch")
+find_package(Catch2 REQUIRED)
 
 add_library(Trompeloeil INTERFACE)
 target_include_directories(Trompeloeil INTERFACE "trompeloeil")
 
 
 add_library(TestMain TestMain.cpp)
-target_link_libraries(TestMain PUBLIC Catch Trompeloeil)
+target_link_libraries(TestMain PUBLIC Catch2::Catch2 Trompeloeil)
 
 
 function(add_test_suite name)