WASM lib: fix compilation with Emscripten

Set C++ standard based on EMSCRIPTEN condition to C++17.

Emscripten 4.0.20 introduced a breaking change where Embind now requires
C++17 or newer.

Author: ruevs

src/slvs/CMakeLists.txt

@@ -44,6 +44,7 @@ if(ENABLE_PYTHON_LIB)
 endif()
 
 if(EMSCRIPTEN)
+    target_compile_features(slvs-wasm PRIVATE cxx_std_17)
     add_executable(slvs-wasm jslib.cpp)
     target_link_libraries(slvs-wasm PRIVATE slvs-interface embind)
     target_link_options(slvs-wasm PRIVATE