Bump github.com/go-openapi/swag from 0.19.15 to 0.20.0

Bumps [github.com/go-openapi/swag](https://github.com/go-openapi/swag) from 0.19.15 to 0.20.0.
- [Release notes](https://github.com/go-openapi/swag/releases)
- [Commits](go-openapi/swag@v0.19.15...v0.20.0)

---
updated-dependencies:
- dependency-name: github.com/go-openapi/swag
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/cyberphone/json-canonicalization v0.0.0-20210823021906-dc406ceaf94b
 	github.com/go-openapi/runtime v0.21.1
 	github.com/go-openapi/strfmt v0.21.1
-	github.com/go-openapi/swag v0.19.15
+	github.com/go-openapi/swag v0.20.0
 	github.com/go-piv/piv-go v1.9.0
 	github.com/google/certificate-transparency-go v1.1.2
 	github.com/google/go-cmp v0.5.7

go.sum

@@ -846,8 +846,9 @@ github.com/go-openapi/swag v0.19.9/go.mod h1:ao+8BpOPyKdpQz3AOJfbeEVpLmWAvlT1IfT
 github.com/go-openapi/swag v0.19.12/go.mod h1:eFdyEBkTdoAf/9RXBvj4cr1nH7GD8Kzo5HTt47gr72M=
 github.com/go-openapi/swag v0.19.13/go.mod h1:QYRuS/SOXUCsnplDa677K7+DxSOj6IPNl/eQntq43wQ=
 github.com/go-openapi/swag v0.19.14/go.mod h1:QYRuS/SOXUCsnplDa677K7+DxSOj6IPNl/eQntq43wQ=
-github.com/go-openapi/swag v0.19.15 h1:D2NRCBzS9/pEY3gP9Nl8aDqGUcPFrwG2p+CNFrLyrCM=
 github.com/go-openapi/swag v0.19.15/go.mod h1:QYRuS/SOXUCsnplDa677K7+DxSOj6IPNl/eQntq43wQ=
+github.com/go-openapi/swag v0.20.0 h1:vfH7fw73s0KRWAMtx4SsLLtjmykSr03Uwzl4KcwhBvg=
+github.com/go-openapi/swag v0.20.0/go.mod h1:QYRuS/SOXUCsnplDa677K7+DxSOj6IPNl/eQntq43wQ=
 github.com/go-openapi/validate v0.18.0/go.mod h1:Uh4HdOzKt19xGIGm1qHf/ofbX1YQ4Y+MYsct2VUrAJ4=
 github.com/go-openapi/validate v0.19.2/go.mod h1:1tRCw7m3jtI8eNWEEliiAqUIcBztB2KDnRCRMUi7GTA=
 github.com/go-openapi/validate v0.19.3/go.mod h1:90Vh6jjkTn+OT1Eefm0ZixWNFjhtOH7vS9k0lo6zwJo=