🏃‍♂ use new GetPodVolumesUsingRestic API from core Velero (#70)

Signed-off-by: Ashish Amarnath <[email protected]>

go.mod

@@ -8,17 +8,14 @@ require (
 	github.com/hashicorp/go-hclog v0.12.0 // indirect
 	github.com/hashicorp/go-plugin v1.0.1-0.20190610192547-a1bc61569a26 // indirect
 	github.com/hashicorp/yamux v0.0.0-20181012175058-2f1d1f20f75d // indirect
-	github.com/json-iterator/go v1.1.10 // indirect
 	github.com/kr/pretty v0.2.0 // indirect
 	github.com/kubernetes-csi/external-snapshotter/v2 v2.2.0-rc1
-	github.com/mattn/go-isatty v0.0.12 // indirect
 	github.com/mitchellh/go-testing-interface v1.0.0 // indirect
-	github.com/onsi/gomega v1.8.1 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/sirupsen/logrus v1.6.0
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.4.0
-	github.com/vmware-tanzu/velero v1.4.0
+	github.com/vmware-tanzu/velero v1.5.1
 	k8s.io/api v0.18.4
 	k8s.io/apimachinery v0.18.4
 	k8s.io/client-go v0.18.4