Update dependency rollup to v2.53.0

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	2.52.8 -> 2.53.0

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Release Notes

rollup/rollup

v2.53.0

Compare Source

2021-07-09

Features

• Add maxParallelFileReads option to limit read operations with a default of 20 (#​4170)

Merge Requests

• #​4170: Limit parallel file reads to prevent "EMFILE: too many open files" error (@​schummar)

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