Fix compatibility with CMake < 3.14 (#223)

`NAME_WLE` was introduced in 3.14

Author: Flamefire

test/CMakeLists.txt

@@ -8,7 +8,7 @@ endif()
 
 file(GLOB CORE_RUN_FILES "core/run/*.cpp")
 foreach (testsourcefile ${CORE_RUN_FILES})
-    get_filename_component(testname ${testsourcefile} NAME_WLE)
+    get_filename_component(testname ${testsourcefile} NAME_WE)
     add_executable(pfr_core_${testname} ${testsourcefile})
     target_link_libraries(pfr_core_${testname} Boost::pfr Boost::core Boost::container_hash)
     target_include_directories(pfr_core_${testname} PRIVATE ../../../)
@@ -18,7 +18,7 @@ endforeach()
 
 file(GLOB CORE_NAME_RUN_FILES "core_name/run/*.cpp")
 foreach (testsourcefile ${CORE_NAME_RUN_FILES})
-    get_filename_component(testname ${testsourcefile} NAME_WLE)
+    get_filename_component(testname ${testsourcefile} NAME_WE)
     add_executable(pfr_corename_${testname} ${testsourcefile})
     target_compile_features(pfr_corename_${testname} PUBLIC cxx_std_20)
     target_link_libraries(pfr_corename_${testname} Boost::pfr Boost::core Boost::container_hash)