fix: Make decay easing respect the config.precision prop

[claytercek]

Why

The current behavior for a decay animation is to finish when the difference between the current spring value and the value during the previous frame is less than the arbitrary value of 0.1. In most cases this is alright, but if the scale of the animation is significantly small, then we start to notice some weird behavior, where the animation seems to stop prematurely. Here's an example codesandbox where you can simulate different scales: https://codesandbox.io/s/react-spring-decay-scale-j5kfqm?file=/src/App.js

One situation where this is particularly apparent is when using react-spring in combination with react-three-fiber, and animating in world space. Demo here: https://codesandbox.io/s/r3f-inertia-camera-qqhvxk?file=/src/InertiaCamera.js

What

This PR replaces that arbitrary 1.0 value with the same precision value being used for spring easing.

I've moved the precision calculation to a slightly higher scope, so that it can be shared between both spring and decay easing.

Checklist

• Documentation updated
• Ready to be merged

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Name	Status	Preview	Updated
react-spring-io	✅ Ready (Inspect)	Visit Preview	Aug 11, 2022 at 9:37PM (UTC)

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

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Latest deployment of this branch, based on commit 3de005d:

Sandbox	Source
spring-animating-auto	Configuration
spring-card	Configuration
spring-cards-stack	Configuration
spring-chain	Configuration
spring-css-keyframes	Configuration
spring-draggable-list	Configuration
spring-exit-before-enter	Configuration
spring-flip-card	Configuration
spring-goo-blobs	Configuration
spring-image-fade	Configuration
spring-list-reordering	Configuration
spring-masonry	Configuration
spring-multistage-transition	Configuration
spring-notification-hub	Configuration
spring-notification-hub	Configuration
spring-notification-hub	Configuration
initial-rocket	Configuration
spring-simple-transition	Configuration
spring-svg-filter	Configuration
spring-slide	Configuration
spring-tree	Configuration
spring-viewpager	Configuration
react-spring decay scale	PR
r3f inertia camera	PR

[joshuaellis]

Not sure how I missed this so sorry for the late reply, but this is a great catch thank you! I have one small request though, see comment!