Update dependency helmet to v7.1.0

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
helmet (source)	7.0.0 -> 7.1.0

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Release Notes

helmetjs/helmet (helmet)

v7.1.0

Compare Source

Added

• helmet.crossOriginEmbedderPolicy now supports the unsafe-none directive. See #​477

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