Script for auto release

[antfu]

This should be merged after #4

by running

npm run release

it will create a new release and upload files under ./dist to it.

I have also make font version reads from package.json and you may need to change the build filed in the scripts section of package.json

The execution order will be

Bump version -> npm run build -> node scripts/releasenotes.js -> Commit -> Tag -> Push -> Create Release -> Upload assets

For more details, please refer to https://github.com/release-it/release-it