[bug] useStorage default value undefined get's written to localStorage and read as "undefined"

[ByScripts]

Describe the bug

In fact it's the same bug as #597 but is about undefined instead of null.

The bug has been fixed by adding the condition if (defaultValue !== null).

But I wonder if the condition shouldn't have been if (defaultValue != null) instead, to support either null or undefined.

What do you think? Is it that simple?

Reproduction

https://play.vueuse.org/#N4IgDghgxg1hDmBTAziAXAbVAOwgW0XRADcBXRAWgBNE8BLEAGhGQHtSAnKQtEU7MDHhMQNZFA50wAFzqtsRAGrkABABFadFQAoAFhAA2AMxV1sKgGIdE2KLoCUp5CogqaxRAdZgz8FaVkDOmkATxcDLwB3ZxD2FWlWFUjJaUQVAFVsOg8OZEMVZTSAGToAIw4ISRQVI1YOAtUAJhUAMhUAZhFOAyJdaWkwZDQAemH+QXgAOihWPGGyShp6YaDS4bMaAA9JvAArVABfRhx8HhAAAQXSZERh5H1rKhE2Tm4icaERMQkpWXkiADKD0QVAaiHSN38gWCdBQky6HB6vD6AyGow+Uxmc0u5Gut3ulRB5wAjAAGSbEyak9bYLY7fYgI4nAhEHGIPHDGbWZ7sLhnDFfFA-GRyBS8ADCrAiiCgf3MrBMKBu2Fk+UKKkleDArGQMPkGWhshQCKRIBRgxGYwEQmms2GbI5XMQJPJlOpG0Q2z2hwAuswjHQDMa0KAAIJgMCTBboUCpLUGCCpIgAHio2QAfAAlTysCCg6S6OjOSBIeKJLx5tyJ1xGDizFQ3ZC6+QAhIVJCTZPDNPEdMAHWwqYzAAN+DQA9gQcOVHYZTA0CpgMAXMhMuOzCCVABeHf+WmICebgD8Kj7IEAoORnlQLs+AXg3ACy7V4OBy7Pf7g7fw+wpAi09nsAXJcVwAOR-Axt13b8IhUE8z0vEBr1PEAHyfF9uwzZ5hWkIg6C1OppEXfwbgBJVRVbOoEDSA4ajrPAVAAcgdG5OTqRB6IHAcZmwZACIgVd90PUEtyIxASKbMi20o7Qzz4igxwPDcqDPRg93XScqHsTj5B4kCwO3ESxObbByPbRBpJAWSoIMZSVCszTsC07ipUQSYvHgbQ+LXBT1KjQxyBUvjQIiXyDHIexGWfIA

System Info

System:
    OS: macOS 14.0
    CPU: (10) arm64 Apple M2 Pro
    Memory: 52.56 MB / 16.00 GB
    Shell: 3.6.1 - /opt/homebrew/bin/fish
  Binaries:
    Node: 21.2.0 - /opt/homebrew/bin/node
    Yarn: 1.22.19 - /opt/homebrew/bin/yarn
    npm: 10.2.3 - /opt/homebrew/bin/npm
    pnpm: 8.5.1 - ~/Library/pnpm/pnpm
    bun: 1.0.13 - /opt/homebrew/bin/bun
  Browsers:
    Brave Browser: 119.1.60.118
    Chrome: 119.0.6045.159
  npmPackages:
    @vueuse/core: ^10.1.2 => 10.6.1
    @vueuse/math: ^10.1.2 => 10.6.1
    vue: ^3.3.4 => 3.3.8

Used Package Manager

yarn

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a VueUse issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to https://github.com/vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.