chore: use public repository metadata

[pqmashiro-commits]

Summary

• Update repository.url from the legacy git:// protocol to a public HTTPS git URL.
• Keep the change metadata-only: no runtime code, dependency, lockfile, package version, or build output changes.

Why

The published gulp-dart-sass@1.1.0 package metadata reports:

{
  "type": "git",
  "url": "git://github.com/mattdsteele/gulp-dart-sass.git"
}

The current source package.json has the same legacy transport, without the trailing .git:

{
  "type": "git",
  "url": "git://github.com/mattdsteele/gulp-dart-sass"
}

Using git+https://github.com/mattdsteele/gulp-dart-sass.git makes the package metadata easier to consume in environments where unauthenticated git:// traffic may be blocked or discouraged.

Contributing note

The contributing guide asks contributors to open an issue before a PR, but GitHub reports Issues are disabled for this repository (has_issues: false). I opened the PR directly because this is a small metadata-only cleanup.

I did not update CHANGELOG.md because this does not change package runtime behavior, dependencies, public API, or generated output.

Verification

node -e "const p=require('./package.json'); if (p.repository.url !== 'git+https://github.com/mattdsteele/gulp-dart-sass.git') { console.error(p.repository); process.exit(1) } console.log(p.name, p.version, p.repository.url)"
git diff --check
pnpm pack --dry-run --json

Observed metadata check output:

gulp-dart-sass 1.1.0 git+https://github.com/mattdsteele/gulp-dart-sass.git

pnpm pack --dry-run --json completed successfully. git diff --check reported no whitespace errors, aside from the normal Windows LF-to-CRLF working-copy warning.