Minor code improvements

[sajadhsm]

This PR address some of the issues listed in #92:

• No need to write <template #default> for suspense
• useArticles composable:
  • In fetchArticles function, since articleType can only have one value, it's better to use if-else rather than only if to skip other checks.
  • getArticlesMeta function is acting like a composable. So maybe it's better to rename it to useArticlesMeta
• Vue docs doesn't recommend using generic argument for reactive(). So it may be better to change current generic usage.
• In AppLink component, useAttrs and v-bind="attrs" can be removed because of Fallthrough Attributes

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/mutoe/vue3-realworld-example-app/HwemJ4c1L3jJPxs2da2zSDD2b7Ft
✅ Preview: https://vue3-realworld-example-app-git-fork-sajadhsm-minor-689858-mutoe.vercel.app

[mutoe]

Thanks for your contribution! 😄️

A little tip: you can use the refactor prefix with your commit message when you are doing something that is refactoring or cleaning up the code.

https://github.com/angular/angular/blob/master/CONTRIBUTING.md#-commit-message-format