remove C++ std limitation for linux and android

android/src/main/jni/CMakeLists.txt

@@ -30,6 +30,7 @@ target_sources(${JNI_LIB_NAME} PUBLIC
     ${QUICK_JS_LIB_DIR}/libunicode.c
     ${QUICK_JS_LIB_DIR}/quickjs.c
 )
+target_compile_features(${JNI_LIB_NAME} PUBLIC cxx_std_17)
 
 # Searches for a specified prebuilt library and stores the path as a
 # variable. Because CMake includes system libraries in the search path by

android/src/main/kotlin/soko/ekibun/flutter_qjs/FlutterQjsPlugin.kt

@@ -29,7 +29,6 @@ class FlutterQjsPlugin: FlutterPlugin, MethodCallHandler {
   override fun onMethodCall(call: MethodCall, result: Result) {
     if (call.method == "createEngine") {
       val engine: Long = JniBridge.instance.createEngine(channelwrapper)
-      println(engine)
       result.success(engine)
     } else if (call.method == "evaluate") {
       val engine: Long = call.argument<Long>("engine")!!
@@ -43,7 +42,6 @@ class FlutterQjsPlugin: FlutterPlugin, MethodCallHandler {
       JniBridge.instance.call(engine, function, args, ResultWrapper(handler, result))
     } else if (call.method == "close") {
       val engine: Long = call.arguments<Long>()
-      println(engine)
       JniBridge.instance.close(engine)
       result.success(null)
     } else {