perf: inline wrenObjectToValue and switch Xcode project to C99 for speed bump

src/wren_value.c

@@ -323,14 +323,4 @@ int wrenIsString(Value value)
   return IS_OBJ(value) && AS_OBJ(value)->type == OBJ_STRING;
 }
 
-Value wrenObjectToValue(Obj* obj)
-{
-  #if WREN_NAN_TAGGING
-  return (Value)(SIGN_BIT | QNAN | (uint64_t)(obj));
-  #else
-  Value value;
-  value.type = VAL_OBJ;
-  value.obj = obj;
-  return value;
-  #endif
-}
+extern Value wrenObjectToValue(Obj* obj);

src/wren_value.h

@@ -446,6 +446,17 @@ int wrenIsClosure(Value value);
 int wrenIsFn(Value value);
 int wrenIsInstance(Value value);
 int wrenIsString(Value value);
-Value wrenObjectToValue(Obj* obj);
+
+inline Value wrenObjectToValue(Obj* obj)
+{
+#if WREN_NAN_TAGGING
+  return (Value)(SIGN_BIT | QNAN | (uint64_t)(obj));
+#else
+  Value value;
+  value.type = VAL_OBJ;
+  value.obj = obj;
+  return value;
+#endif
+}
 
 #endif