After v0.137 Some module export has conflict on examples/jsm

[dellwatson]

Description

After version 0.137 has problem.
I tried to import one of the example/jsm module which is Curve and it is result in undefined since v0.138 - latest
even though the file is exist there.

https://codesandbox.io/s/restless-platform-7p9nrs?file=/src/store.js
I cannot import three/examples/jsm/curves might affect the whole some of jsm

on migration 137-138 
https://github.com/mrdoob/three.js/wiki/Migration-Guide#137--138
has  update The node material in examples/jsm/nodes has been replaced with a new implementation. 

seems that upgrade is the culprit, so i will try to check commit there soon.

Reproduction steps

1. install three on version above 0.137+
2. import { Curves } from "three/examples/jsm/curves/CurveExtras"
3. it will show undefined

Code

import { Curves } from "three/examples/jsm/curves/CurveExtras";

  // version 138 -> latest will shows undefined
  console.log(Curves, "curves x");

Live example

• quick-reproduction-to-check

Screenshots

No response

Version

0.138 -> 0.155

Device

No response

Browser

No response

OS

No response

[ycw]

- import { Curves } from "three/examples/jsm/curves/CurveExtras";
+ import * as Curves from "three/examples/jsm/curves/CurveExtras";

three.js/examples/jsm/curves/CurveExtras.js

Lines 407 to 422 in b447ff2

	export {
	GrannyKnot,
	HeartCurve,
	VivianiCurve,
	KnotCurve,
	HelixCurve,
	TrefoilKnot,
	TorusKnot,
	CinquefoilKnot,
	TrefoilPolynomialKnot,
	FigureEightPolynomialKnot,
	DecoratedTorusKnot4a,
	DecoratedTorusKnot4b,
	DecoratedTorusKnot5a,
	DecoratedTorusKnot5c
	};

r155 🫴🏻

[Mugen87]

#23402 changed the import syntax.

I'll updated the migration guide to avoid similar confusion in the future.