chore(deps): bump github.com/caddyserver/certmagic from 0.19.2 to 0.20.0

[dependabot]

Bumps github.com/caddyserver/certmagic from 0.19.2 to 0.20.0.

Release notes

Sourced from github.com/caddyserver/certmagic's releases.

v0.20.0

This release vastly improves storage cleaning as well improving a few smaller things. There is a minor breaking change as we get ever closer to v1.0.

• ⚠️ The DecisionFunc for On-Demand TLS now takes a context.Context value as its first argument. The context carries the ClientHelloInfo value (keyed by ClientHelloInfoCtxKey) for logging purposes.
• Storage cleaning is now synchronized across the cluster, including process restarts. The state of cleaning expired certificates and OCSP staples is written to storage, and distributed locking is used to ensure that only 1 instance does it at a time. This greatly reduces costs for expensive storage backends! Cleaning is also done less often when the process is frequently restarted because the state is written to storage, so it is not forgotten after shutting down.
• .home.arpa is now considered an internal suffix.
• Backoff timings have been tuned based on real-world experience.

What's Changed

• README: Add hint about NextProtos for certmagic.TLS by @​oliverpool in caddyserver/certmagic#251
• Bump golang.org/x/net from 0.11.0 to 0.17.0 by @​dependabot in caddyserver/certmagic#253
• Optionally pass the context argument down to the OnDemand decision func by @​ankon in caddyserver/certmagic#255
• Retain the error stack if checkIfCertShouldBeObtained returns an error by @​ankon in caddyserver/certmagic#256
• Add OCSP stapling unit tests by @​kenjenkins in caddyserver/certmagic#259

New Contributors

• @​oliverpool made their first contribution in caddyserver/certmagic#251

Full Changelog: caddyserver/certmagic@v0.19.2...v0.20.0

Commits

• 707ebd9 Fix typo, tune backoff more
• 2b4a688 Add OCSP stapling unit tests (#259)
• 4574cfa Fix unserializable ClientHelloInfo
• 7548446 Don't try to decode last clean data if file does not exist
• e017bf7 Fix test (context can't be set in ClientHelloInfo)
• db6a576 Add decoded ClientHello to DecisionFunc context
• ee3b26a Global exclusion lock on storage cleaning
• 6349355 Tune exponential backoff
• e8e6167 Wrap error returned from checkIfCertShouldBeObtained (#256)
• f0038ff Add context arg to DecisionFunc (#255)
• Additional commits viewable in compare view

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