tweening to arrays of values has bug

[tvytlx]

_valuesEnd[property]'s length will grow endless, because it's a reference to this.valuesEnd

tween.js/src/Tween.ts

Lines 138 to 150 in 8db070d

	if (isInterpolationList) {
	let endValues = _valuesEnd[property] as Array<number | string>
	if (endValues.length === 0) {
	continue
	}
	// handle an array of relative values
	endValues = endValues.map(this._handleRelativeValue.bind(this, startValue as number))
	// Create a local copy of the Array with the start value at the front
	_valuesEnd[property] = [startValue].concat(endValues)
	}

checking this demo, just click the start button twice or more: https://jsbin.com/hulidowipa/edit?html,js,output

[tvytlx]

@trusktr hi, could you please check my pr? 🙏

[trusktr]

Hello, sorry for the late reply. Thanks for looking at this!

The build in the PR has an error with Prettier. Would you mind adding a small unit test for this?

[trusktr]

fixed in #621