[Question] How to specify different formats for multiple exports?

I'm trying to setup `microbundle` to provide separate exports for several modules my package is exporting, like this:
```json
{
"name": "x",
"type": "module",
"version": "10.0",
"author": "y",
"license": "MIT",
"devDependencies": {
"microbundle": "^0.15.0",
"np": "^7.6.1",
"typescript": "^4.6.4"
},
"dependencies": {},
"scripts": {
"prepare": "microbundle ./src/one.ts ./src/two.ts"
},
"exports": {
"one": "./dist/one.modern.js",
"two": "./dist/two.modern.js"
},
"files": [
"dist"
],
"types": "dist/index.d.ts"
}
```

However, I don't know how to specify different export formats for each one of my exports.

The documentations provides either this example, which shows how to proceed when doing "single" exports:
```json
"exports": {
"require": "./dist/foo.cjs",
"default": "./dist/foo.modern.js"
},
```
or this example, which shows an example of multiple exports, but in a single format:
```json
"exports": {
".": "./dist/foo.modern.mjs",
"./lite": "./dist/lite.modern.mjs",
"./full": "./dist/full.modern.mjs"
},
```

How could I specify multiple formats like in the 1st example, while still specifying multiple named exports like in the 2nd example?

The issue names no repository file or test, but includes package.json exports examples and the microbundle command. Start by reviewing the documented single-export and multiple-export examples; done means clarifying whether per-export format mappings are supported and documenting the applicable configuration or limitation.

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