Update dependency rollup to v4.21.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	4.20.0 -> 4.21.0

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Release Notes

rollup/rollup (rollup)

v4.21.0

Compare Source

2024-08-18

Features

• Add option to configure directory for virtual modules when preserving modules (#​5602)

Pull Requests

• #​5602: feat: introduce the virtualDirname option to customize the virtual directory name (@​TrickyPi)
• #​5607: chore(deps): update typescript-eslint monorepo to v8 (major) (@​renovate[bot], @​lukastaegert)
• #​5608: chore(deps): lock file maintenance minor/patch updates (@​renovate[bot])
• #​5611: chore: fix the noConflict option in REPL. (@​7086cmd)
• #​5613: chore(deps): lock file maintenance minor/patch updates (@​renovate[bot])
• #​5614: chore(deps): lock file maintenance (@​renovate[bot])

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