* Fix reactive assignments with destructuring and stores where the destructured value should be undefined ([#4170](https://github.com/sveltejs/svelte/issues/4170))
* Fix hydrating `{:else}` in `{#each}` ([#4202](https://github.com/sveltejs/svelte/issues/4202))
* Do not automatically declare variables in reactive declarations when assigning to a member expression ([#4212](https://github.com/sveltejs/svelte/issues/4212))
* Fix stringifying of attributes in SSR mode when there are spread attributes ([#4240](https://github.com/sveltejs/svelte/issues/4240))
* Only render one `<title>` in SSR mode when multiple components provide one ([#4250](https://github.com/sveltejs/svelte/pull/4250))