Update dependency sapper to v0.29.3 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sapper	0.29.2 -> 0.29.3

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Release Notes

sveltejs/sapper

### [`v0.29.3`](https://togithub.com/sveltejs/sapper/blob/master/CHANGELOG.md#​0293) [Compare Source](https://togithub.com/sveltejs/sapper/compare/v0.29.2...v0.29.3) - Generate ESM code when project's `package.json` indicates `"type": "module"` ([#​1800](https://togithub.com/sveltejs/sapper/pull/1800))

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Configuration

📅 Schedule: "before 3am on the first day of the month" (UTC).

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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