Let MrDocs compile the code as C++17

Reason: Getting the noexcept specifications introduced in "Reflect some
noexcept specifications of std::vector in dynamic_bitset".

Author: gennaroprota

CMakeLists.txt

@@ -44,6 +44,10 @@ if (DYNAMIC_BITSET_MRDOCS_BUILD)
     # Create a custom target for MrDocs.
     add_library(dynamic_bitset_mrdocs_target ${TEMP_CPP_FILE})
 
+    # This is to get some noexcept specifications which are only added
+    # if the code is compiled as C++17 or later.
+    set_target_properties(dynamic_bitset_mrdocs_target PROPERTIES CXX_STANDARD 17 CXX_STANDARD_REQUIRED YES)
+
     # Set any other target properties here.
     target_include_directories(dynamic_bitset_mrdocs_target PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include")
     target_link_libraries(dynamic_bitset_mrdocs_target PRIVATE boost_dynamic_bitset)