Bundling issue: main script is `index.js.js` rather than `index.js`

[myabc]

To reproduce:

• install the latest @knowledgecode/delegate from npm.
• import the library

import { delegate, DelegateEvent } from '@knowledgecode/delegate';

When we try to use the library, esbuild reports the following issue:

✘ [ERROR] Could not resolve "@knowledgecode/delegate"

Details:

the npm dependency specifies index.js in its main entry. However, index.js.js is packaged:

$ ls node_modules/@knowledgecode/delegate/dist/
delegate.d.ts dispatch.d.ts event.d.ts    index.d.ts    index.js.js   utils.d.ts