chore: update rollup

[trusktr]

Continues from PR

• https://github.com/docsifyjs/docsify/pull/2106 (review that one first)

Part of

• https://github.com/docsifyjs/docsify/issues/2104

Summary

Update rollup and plugins, and remove some plugins. We'll use Rollup for now only to bundle and minify our code, but otherwise we'll write reasonably modern code and not need a transform.

What kind of change does this PR introduce?

Build-related changes

For any code change,

• [ ] Related documentation has been updated if needed
• [ ] Related tests have been updated or tests have been added

Does this PR introduce a breaking change? (check one)

• [ ] Yes
• [x] No

If yes, please describe the impact and migration path for existing applications:

Related issue, if any:

This is part of Simplify and modernize Docsify

Tested in the following browsers:

• [x] Chrome
• [x] Firefox
• [x] Safari
• [x] Edge
• [ ] IE

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Name	Status	Preview	Comments	Updated (UTC)
docsify-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 16, 2023 5:11pm

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