Fix integration - Take II

Author: jfalcou

.github/workflows/integration.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Run Sample CMake
         run: |
           mkdir install && cd install
-          cmake ../test/integration/install-test -G Ninja
+          cmake ../test/integration/install-test -G Ninja  -DCMAKE_CXX_FLAGS="-std=c++20"
           ninja && ctest --verbose
 
   fetch-content:

test_package/CMakeLists.txt

@@ -5,7 +5,7 @@ include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
 conan_basic_setup()
 
 add_library(spy_config INTERFACE)
-target_compile_features ( spy_config INTERFACE  cxx_std_17 )
+target_compile_features ( spy_config INTERFACE  cxx_std_20 )
 
 add_executable(example example.cpp)
 target_link_libraries(example ${CONAN_LIBS} PUBLIC spy_config)