fix: opt in to import.meta.* properties

[danielroe]

This is a very early PR to make this module compatible with changes we expect to release in Nuxt v5.

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 57.47%. Comparing base (9e24605) to head (9a626a4).

Files	Patch %	Lines
src/runtime/router.ts	0.00%	7 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #526   +/-   ##
=======================================
  Coverage   57.47%   57.47%           
=======================================
  Files          11       11           
  Lines         729      729           
  Branches       35       35           
=======================================
  Hits          419      419           
  Misses        310      310           

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