Update dependency express-prom-bundle to v6.6.0

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
express-prom-bundle	6.5.0 -> 6.6.0

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Release Notes

jochen-schweizer/express-prom-bundle

v6.6.0

Compare Source

• bypass now can take object with 2 callbacks, checking if the the request should be counted before and/or after the request was processed. ( thanks to @​ineentho )

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