Cleanup useComputed's on unmount

[developit]

Need to duplicate this in the React version.

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Latest commit: 4ff4eb7738d9207ed8909058f857a3e820ebf556

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[github-actions[bot]]

Size Change: -767 B (-1%)

Total Size: 59 kB

Filename	Size	Change
docs/dist/assets/index.********.js	233 B	-830 B (-78%)	🏆
docs/dist/assets/signals.module.********.js	5.68 kB	+15 B (0%)
packages/preact/dist/signals.js	1.16 kB	+25 B (+2%)
packages/preact/dist/signals.mjs	1.14 kB	+23 B (+2%)

ℹ️ View Unchanged

Filename	Size
docs/dist/assets/basic.********.js	217 B
docs/dist/assets/client.********.js	45.8 kB
docs/dist/assets/signals-core.module.********.js	870 B
docs/dist/assets/style.********.css	585 B
packages/core/dist/signals-core.js	1 kB
packages/core/dist/signals-core.mjs	829 B
packages/react/dist/signals.js	798 B
packages/react/dist/signals.mjs	753 B

_{compressed-size-action}

[jviide]

I believe this can be closed. Computeds don't need to be explicitly disposed anymore since @preact/signals-core v1.2.0.

[JoviDeCroock]

Closing it based on @jviide's comment