Update prom-client to the latest version 🚀

[greenkeeper]

The dependency prom-client was updated from 11.5.3 to 12.0.0.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

---

Publisher: siimon
License: Apache-2.0

Release Notes for 12.0.0

Breaking

• Dropped support for end-of-life Node.js versions 6.x and 8.x
• Dropped the previously deprecated support for positional parameters in
  constructors, only the config object forms remain.
• Default metrics are collected on scrape of metrics endpoint, not on an
  interval. The timeout option to collectDefaultMetrics(conf) is no longer
  supported or needed, and the function no longer returns a Timeout object.

Changed

• chore: remove ignored package-lock.json
• fix: process_max_fds is process limit, not OS (#314)
• Changed Metric labelNames & labelValues in TypeScript declaration to a generic type T extends string, instead of string
• Lazy-load Node.js Cluster module to fix Passenger support (#293)
• fix: avoid mutation bug in registry.getMetricsAsJSON()
• fix: improve performance of registry.getMetrics*
• End function of histogram startTimer, when invoked returns the number of seconds
• chore: reindent package.json
• chore: correct var name in processStartTime
• chore: add test for process_start_time_seconds
• chore: spelling corrections in README

Added

• feat: implement GC metrics collection without native(C++) modules.
• faet: implement advanced event loop monitoring

Commits

The new version differs by 26 commits.

• 21fea7e 12.0.0
• 41c9523 feature: remove all timestamp support (#333)
• 5aca6a9 fix: collect metrics on scrape, not timeout (#329)
• c63689b feat: implement advanced event loop monitoring (#278)
• fc0497b fix: remove deprecated non-config object support (#330)
• 9b4ef10 feat: implement GC metrics collection without native(C++) modules (#274)
• c9af549 chore: add GH Actions CI (#323)
• 9aea513 chore: update outdated dependencies (#322)
• 3e82cbb chore: spelling corrections in README (#325)
• fa693f7 feat: Return the final duration value from startTimer callback (#282)
• 9e3e506 chore: add test for process_start_time_seconds
• ddfd218 chore: correct var name in processStartTime
• cd29402 chore: remove ignored package-lock.json (#320)
• c0106e1 chore: drop support for Node.js 8.x (appveyor) (#321)
• 3087240 chore: drop support for Node.js 8.x (#315)

There are 26 commits in total.

See the full diff

---

FAQ and help

There is a collection of frequently asked questions. If those don’t help, you can always ask the humans behind Greenkeeper.

---

Your Greenkeeper bot 🌴