chore: Silence warnings when using 'node:' protocol

[rschristian]

The current solution for matching builtins doesn't catch imports using the new-ish node: protocol:

Failed to resolve the module node:http imported by src/index.js
Is the module installed? Note:
↳ to inline a module into your bundle, install it to "devDependencies".
↳ to depend on a module via import/require, install it to "dependencies".

This just adds it to the patterns to match against when the target for Microbundle is Node.

[changeset-bot]

🦋 Changeset detected

Latest commit: b70d7d0

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
microbundle	Patch

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[rschristian]

I purposefully replaced external here as otherwise we get duplicates.

microbundle/src/index.js

Line 339 in 6c59174

letexternal=['dns','fs','path','url'];