Stability: 1 - Experimental
If the "." export is the only export, the ["exports"][] field provides sugar
for this case being the direct ["exports"][] field value.
If the "." export has a fallback array or string value, then the
["exports"][] field can be set to this value directly.
{"exports": {".": "./main.js"}}
can be written:
{"exports": "./main.js"}
