Bump github.com/secure-systems-lab/go-securesystemslib

Bumps [github.com/secure-systems-lab/go-securesystemslib](https://github.com/secure-systems-lab/go-securesystemslib) from 0.3.1 to 0.4.0.
- [Release notes](https://github.com/secure-systems-lab/go-securesystemslib/releases)
- [Commits](secure-systems-lab/go-securesystemslib@v0.3.1...v0.4.0)

---
updated-dependencies:
- dependency-name: github.com/secure-systems-lab/go-securesystemslib
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -54,7 +54,7 @@ require (
 	github.com/open-policy-agent/opa v0.35.0
 	github.com/pierrec/lz4 v2.6.1+incompatible
 	github.com/ryanuber/go-glob v1.0.0
-	github.com/secure-systems-lab/go-securesystemslib v0.3.1
+	github.com/secure-systems-lab/go-securesystemslib v0.4.0
 	github.com/sigstore/fulcio v0.1.2-0.20220114150912-86a2036f9bc7
 	github.com/sigstore/rekor v0.4.1-0.20220114213500-23f583409af3
 	github.com/sigstore/sigstore v1.2.1-0.20220424143412-3d41663116d5

go.sum

@@ -2021,8 +2021,9 @@ github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg
 github.com/seccomp/libseccomp-golang v0.9.1/go.mod h1:GbW5+tmTXfcxTToHLXlScSlAvWlF4P2Ca7zGrPiEpWo=
 github.com/secure-systems-lab/go-securesystemslib v0.2.0/go.mod h1:eIjBmIP8LD2MLBL/DkQWayLiz006Q4p+hCu79rvWleY=
 github.com/secure-systems-lab/go-securesystemslib v0.3.0/go.mod h1:o8hhjkbNl2gOamKUA/eNW3xUrntHT9L4W89W1nfj43U=
-github.com/secure-systems-lab/go-securesystemslib v0.3.1 h1:LJuyMziazadwmQRRu1M7GMUo5S1oH1+YxU9FjuSFU8k=
 github.com/secure-systems-lab/go-securesystemslib v0.3.1/go.mod h1:o8hhjkbNl2gOamKUA/eNW3xUrntHT9L4W89W1nfj43U=
+github.com/secure-systems-lab/go-securesystemslib v0.4.0 h1:b23VGrQhTA8cN2CbBw7/FulN9fTtqYUdS5+Oxzt+DUE=
+github.com/secure-systems-lab/go-securesystemslib v0.4.0/go.mod h1:FGBZgq2tXWICsxWQW1msNf49F0Pf2Op5Htayx335Qbs=
 github.com/securego/gosec/v2 v2.9.1/go.mod h1:oDcDLcatOJxkCGaCaq8lua1jTnYf6Sou4wdiJ1n4iHc=
 github.com/segmentio/ksuid v1.0.4 h1:sBo2BdShXjmcugAMwjugoGUdUV0pcxY5mW4xKRn3v4c=
 github.com/segmentio/ksuid v1.0.4/go.mod h1:/XUiZBD3kVx5SmUOl55voK5yeAbBNNIed+2O73XgrPE=