refact(deps): use lib-csi v0.6.0 for csi pv leak protection (openebs#90)

Signed-off-by: Yashpal Choudhary <[email protected]>

Author: iyashu

Diff for: go.mod

@@ -59,7 +59,7 @@ require (
 	github.com/kubernetes-csi/csi-lib-utils v0.9.0
 	github.com/onsi/ginkgo v1.11.0
 	github.com/onsi/gomega v1.7.0
-	github.com/openebs/lib-csi v0.5.0
+	github.com/openebs/lib-csi v0.6.0
 	github.com/pkg/errors v0.9.1
 	github.com/spf13/cobra v1.1.1
 	github.com/stretchr/testify v1.6.1