chore(caddy): bump github.com/dunglas/mercure/caddy

Bumps the go-modules group in /caddy with 1 update: [github.com/dunglas/mercure/caddy](https://github.com/dunglas/mercure).


Updates `github.com/dunglas/mercure/caddy` from 0.18.4 to 0.19.0
- [Release notes](https://github.com/dunglas/mercure/releases)
- [Changelog](https://github.com/dunglas/mercure/blob/main/.goreleaser.yml)
- [Commits](dunglas/mercure@v0.18.4...v0.19.0)

---
updated-dependencies:
- dependency-name: github.com/dunglas/mercure/caddy
  dependency-version: 0.19.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: go-modules
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

caddy/go.mod

@@ -1,7 +1,6 @@
 module github.com/dunglas/frankenphp/caddy
 
 go 1.24
-
 toolchain go1.24.2
 
 replace github.com/dunglas/frankenphp => ../
@@ -13,7 +12,7 @@ require (
 	github.com/caddyserver/certmagic v0.23.0
 	github.com/dunglas/caddy-cbrotli v1.0.0
 	github.com/dunglas/frankenphp v1.5.0
-	github.com/dunglas/mercure/caddy v0.18.4
+	github.com/dunglas/mercure/caddy v0.19.0
 	github.com/dunglas/vulcain/caddy v1.2.0
 	github.com/prometheus/client_golang v1.22.0
 	github.com/spf13/cobra v1.9.1
@@ -60,7 +59,7 @@ require (
 	github.com/dlclark/regexp2 v1.11.5 // indirect
 	github.com/dolthub/maphash v0.1.0 // indirect
 	github.com/dunglas/httpsfv v1.1.0 // indirect
-	github.com/dunglas/mercure v0.18.4 // indirect
+	github.com/dunglas/mercure v0.19.0 // indirect
 	github.com/dunglas/vulcain v1.2.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect

caddy/go.sum

@@ -168,10 +168,10 @@ github.com/dunglas/caddy-cbrotli v1.0.0 h1:+WNqXBkWyMcIpXB2rVZ3nwcElUbuAzf0kPxNX
 github.com/dunglas/caddy-cbrotli v1.0.0/go.mod h1:KZsUu3fnQBgO0o3YDoQuO3Z61dFgUncr1F8rg8acwQw=
 github.com/dunglas/httpsfv v1.1.0 h1:Jw76nAyKWKZKFrpMMcL76y35tOpYHqQPzHQiwDvpe54=
 github.com/dunglas/httpsfv v1.1.0/go.mod h1:zID2mqw9mFsnt7YC3vYQ9/cjq30q41W+1AnDwH8TiMg=
-github.com/dunglas/mercure v0.18.4 h1:fhi1t1LIK2EqIDAMHSMH1lpmZTUu5hLXykXbJ718vp0=
-github.com/dunglas/mercure v0.18.4/go.mod h1:J/WQtiI31VacQJ1CBV1pqisKzPjoxIaZ9ZUSyhctKas=
-github.com/dunglas/mercure/caddy v0.18.4 h1:uxG50dbnsgNaDAlHX+8Y1b62ZvEcw1eHt5LrC6as0nQ=
-github.com/dunglas/mercure/caddy v0.18.4/go.mod h1:187W43Uae6s+bga5NJ8p+07Avbj3UsT78wA7/+3KMEw=
+github.com/dunglas/mercure v0.19.0 h1:GGi0Q1u864/i6g3UoHoFb2ulKdsl22BB1cy4b/pHl3k=
+github.com/dunglas/mercure v0.19.0/go.mod h1:T+jHRIkAw/yKQuBNHBROj93dPhjQDfNHNOehGci4P8U=
+github.com/dunglas/mercure/caddy v0.19.0 h1:FBwJ88lnkyVUsG4c3RlVfDDy9f3Q3B28LfzaEzJIhGs=
+github.com/dunglas/mercure/caddy v0.19.0/go.mod h1:DKdo9FfA5pfr16/ZfRSlJ8lgaZ5dmrIkIFRCb3OQ/zU=
 github.com/dunglas/vulcain v1.2.0 h1:RPNYuTe0woh4bGfIMAJ3dCgJDN8VJwhDjucQiCOoUsE=
 github.com/dunglas/vulcain v1.2.0/go.mod h1:LhyYeqSAEw9P65l25CIzS1sRwJxkP75Qa7p8lIHZPsc=
 github.com/dunglas/vulcain/caddy v1.2.0 h1:2O2R7Hn+kkInv6mrmOk5LLDtgRdPKGlXzdFJUKrb/jE=