fix(deps): update dependency prom-client to v15

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
prom-client	^14.2.0 -> ^15.0.0

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Release Notes

siimon/prom-client (prom-client)

v15.1.3

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Changed

• Improve error message when number of registered labels mismatch with the number of labels provided

v15.1.2

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Changed

• Add Registry.PROMETHEUS_CONTENT_TYPE and Registry.OPENMETRICS_CONTENT_TYPE constants to the TypeScript types
• Correctly read and set contentType top level export

Added

• Enable bun.js by catching NotImplemented error (Fixes #​570)

v15.1.1

Compare Source

Changed

• Improve the memory usage of histograms when the enableExemplars option is disabled
• fix: Avoid updating exemplar values during subsequent metric changes (Fixes #​616)

v15.1.0

Compare Source

Changed

• remove unnecessary loop from osMemoryHeapLinux
• Improve performance of hashObject by using pre-sorted array of label names
• Fix type of collectDefaultMetrics.metricsList

Added

• Allow Pushgateway to now require job names for compatibility with Gravel Gateway.
• Allow histogram.startTime() to be used with exemplars.

v15.0.0

Compare Source

Breaking

• drop support for Node.js versions 10, 12, 14, 17 and 19

Changed

• Refactor histogram internals and provide a fast path for rendering metrics to
  Prometheus strings when there are many labels shared across different values.
• Disable custom content encoding for pushgateway delete requests in order to
  avoid failures from the server when using Content-Encoding: gzip header.
• Refactor escapeString helper in lib/registry.js to improve performance and
  avoid an unnecessarily complex regex.
• Cleanup code and refactor to be more efficient
• Correct TS types for working with OpenMetrics
• Updated Typescript and Readme docs for setToCurrentTime() to reflect units as seconds.
• Do not ignore error if request to pushgateway fails
• Make sure to reject the request to pushgateway if it times out

Added

• Support for OpenMetrics and Exemplars

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