[BUG] `useSpring` won't work properly when initial value is 0

[yaquawa]

Reproduce link:
https://codesandbox.io/s/vueusemotion-forked-9zzt7?file=/src/components/Person.vue

Steps to reproduce

1. click "to 100"
2. click "to 0"
3. click "to 100" again

You'll notice that the first time when you click the "to 100" button, the animation won't take effect.
But if you set the initial value to anything number except for 0, it works...

[Tahul]

Hey, thank you for this issue!

It should be resolved in 1.6.0.

Could you try it out? 😄

[yaquawa]

Thanks! it works fine now!!