Update dependency rollup to v4.15.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	4.14.3 -> 4.15.0

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Release Notes

rollup/rollup (rollup)

v4.15.0

Compare Source

2024-04-20

Features

• Add output.importAttributesKey option to select whether to use "with" or "assert" for import attributes (#​5474)

Pull Requests

• #​5474: Add ImportAttributesKey to choose keyword ("with" | "assert") (@​doubleaa93, @​lukastaegert)
• #​5475: chore(deps): lock file maintenance minor/patch updates (@​renovate[bot])
• #​5477: Try to run emulated smoke tests for Linux environments (@​lukastaegert)

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