Mofeng

`Reflect.set(obj, key, 1)` works. But I'd also love to find a way to use `obj[key]=1` directly

Is this error relavate to this issue? This function is not necessary, but it is useful in time serise query. 

Sorry, I didn't see there is an available `now()` function, which is an alternative. 

Hello. I am glad to try this `good first issue`, please assign this to me. Should this API be under `/v1` ？