Changing export was a breaking change, bump version
MODIFY
package-lock.json
package-lock.json
{
"name": "@agoric/nat",
- "version": "1.0.1",
+ "version": "2.0.0",
"lockfileVersion": 1,
"requires": true,
"dependencies": {

MODIFY
package.json
package.json
{
"name": "@agoric/nat",
- "version": "1.0.1",
+ "version": "2.0.0",
"description": "Ensures that a number is within the natural numbers (0, 1, 2...) or throws a RangeError",
"main": "index-commonjs.js",
"module": "index.js",

Changing export was a breaking change, bump version