feat: improve $$ vars type

[ota-meshi]

close sveltejs/eslint-plugin-svelte#482

[changeset-bot]

🦋 Changeset detected

Latest commit: e4acbe3

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

This PR includes changesets to release 1 package

Name	Type
svelte-eslint-parser	Minor

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[coveralls]

Pull Request Test Coverage Report for Build 4998865814

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 36 of 40 (90.0%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.06%) to 90.715%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/parser/typescript/analyze/index.ts	31	35	88.57%

Totals
Change from base Build 4971464667:	-0.06%
Covered Lines:	2139
Relevant Lines:	2281

---

💛 - Coveralls