bump go-containerregistry to 0.6.0

Signed-off-by: Rui Yang <[email protected]>

go.mod

@@ -7,20 +7,14 @@ require (
 	github.com/cenkalti/backoff v2.2.1+incompatible
 	github.com/concourse/go-archive v1.0.1
 	github.com/fatih/color v1.9.0
-	github.com/google/go-containerregistry v0.4.0
+	github.com/google/go-containerregistry v0.6.0
 	github.com/mattn/go-colorable v0.1.6 // indirect
-	github.com/mitchellh/mapstructure v1.3.1 // indirect
 	github.com/onsi/ginkgo v1.14.1
-	github.com/onsi/gomega v1.10.2
-	github.com/pelletier/go-toml v1.8.0 // indirect
-	github.com/simonshyu/notary-gcr v0.0.0-20200416053715-76bd7435b4a6
-	github.com/sirupsen/logrus v1.7.0
-	github.com/spf13/cast v1.3.1 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/viper v1.7.0 // indirect
+	github.com/onsi/gomega v1.10.3
+	github.com/simonshyu/notary-gcr v0.0.0-20211109021545-380a129b0e83
+	github.com/sirupsen/logrus v1.8.1
 	github.com/vbauerster/mpb v3.4.0+incompatible
 	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a // indirect
-	gopkg.in/ini.v1 v1.56.0 // indirect
 )
 
 go 1.16