fix(pkg): allow requiring package.json

[danielroe]

closes nuxt/nuxt#8498

[codecov-io]

Codecov Report

Merging #6 (9063130) into main (b38a06d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main       #6   +/-   ##
=======================================
  Coverage   84.23%   84.23%           
=======================================
  Files           7        7           
  Lines         184      184           
  Branches       49       49           
=======================================
  Hits          155      155           
  Misses         29       29           

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[danielroe]

this is the most backward-compatible way to do this

Alternatively, if we want very specific control:

Suggested change

	"./": "./"
	"./package.json": "./package.json"

[pi0]

Thanks!