Fix: fallback tp default item size for SSR items

[wellyshen]

• Fix: fallback tp default item size for SSR items

[changeset-bot]

🦋 Changeset detected

Latest commit: b5d483d

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

This PR includes changesets to release 1 package

Name	Type
react-cool-virtual	Patch

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[github-actions]

Size Change: +39 B (0%)

Total Size: 19.5 kB

Filename	Size	Change
dist/index.cjs.development.js	4.56 kB	+7 B (0%)
dist/index.cjs.production.min.js	2.77 kB	+8 B (0%)
dist/index.esm.js	4.51 kB	+8 B (0%)
dist/index.umd.development.js	4.72 kB	+8 B (0%)
dist/index.umd.production.min.js	2.85 kB	+8 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
dist/index.js	136 B	0 B

_{compressed-size-action}

[coveralls]

Pull Request Test Coverage Report for Build 900031206

• 0 of 2 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.005%) to 2.074%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/useVirtual.ts	0	2	0.0%

Totals
Change from base Build 899912550:	-0.005%
Covered Lines:	7
Relevant Lines:	261

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💛 - Coveralls