update main and type to published artifact

[brion-fuller]

Description

The main and types field where pointing to non-existing files in dist/src/index.tsx. These files are instead generated at the root level. Some bundlers require this to be a correct path to avoid any assumptions around the entrypoint for a lib.

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] New and existing unit tests pass locally with my changes