Bump github.com/buildpacks/pack to v0.20.0

Signed-off-by: Anthony Emengo <aemengo@vmware.com>

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/armon/circbuf v0.0.0-20190214190532-5111143e8da2
 	github.com/aws/aws-sdk-go v1.36.31
 	github.com/bmatcuk/doublestar v1.1.5
-	github.com/buildpacks/pack v0.18.1
+	github.com/buildpacks/pack v0.20.0
 	github.com/cenkalti/backoff/v4 v4.0.2
 	github.com/certifi/gocertifi v0.0.0-20200922220541-2c3bb06c6054
 	github.com/containerd/console v1.0.1
@@ -38,7 +38,7 @@ require (
 	github.com/go-playground/validator v9.31.0+incompatible
 	github.com/gofrs/flock v0.8.0
 	github.com/golang/protobuf v1.5.2
-	github.com/google/go-cmp v0.5.5
+	github.com/google/go-cmp v0.5.6
 	github.com/google/go-jsonnet v0.17.0
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
 	github.com/google/uuid v1.1.2
@@ -101,22 +101,24 @@ require (
 	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966
 	github.com/slack-go/slack v0.6.5
 	github.com/stretchr/testify v1.7.0
+	github.com/vdemeester/k8s-pkg-credentialprovider v1.18.1-0.20201019120933-f1d16962a4db // indirect
 	github.com/vektra/mockery v1.1.2
 	github.com/zclconf/go-cty v1.8.4
 	github.com/zclconf/go-cty-yaml v1.0.2
 	go.etcd.io/bbolt v1.3.5
 	go.uber.org/goleak v1.1.10
 	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a
-	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
+	golang.org/x/oauth2 v0.0.0-20210402161424-2e8d93401602
 	golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c
-	google.golang.org/api v0.25.0
-	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
-	google.golang.org/grpc v1.33.1
+	google.golang.org/api v0.44.0
+	google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c
+	google.golang.org/grpc v1.38.0
 	google.golang.org/protobuf v1.26.0
 	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
 	k8s.io/api v0.19.4
 	k8s.io/apimachinery v0.19.4
 	k8s.io/client-go v0.19.4
+	k8s.io/code-generator v0.20.1 // indirect
 )
 
 // NOTE(mitchellh): I'm keeping these commented and in here because during