Bump github.com/ikawaha/goahttpcheck from 1.15.11 to 1.15.13

Bumps [github.com/ikawaha/goahttpcheck](https://github.com/ikawaha/goahttpcheck) from 1.15.11 to 1.15.13.
- [Release notes](https://github.com/ikawaha/goahttpcheck/releases)
- [Commits](ikawaha/goahttpcheck@v1.15.11...v1.15.13)

---
updated-dependencies:
- dependency-name: github.com/ikawaha/goahttpcheck
  dependency-version: 1.15.13
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

go.mod

@@ -18,7 +18,7 @@ require (
 	github.com/gorilla/mux v1.8.1
 	github.com/gorilla/sessions v1.3.0
 	github.com/hako/durafmt v0.0.0-20210608085754-5c1018a4e16b
-	github.com/ikawaha/goahttpcheck v1.15.11
+	github.com/ikawaha/goahttpcheck v1.15.13
 	github.com/joho/godotenv v1.5.1
 	github.com/markbates/goth v1.81.0
 	github.com/mitchellh/go-homedir v1.1.0