bump lifecycle image to 0.17.2

this is the highest we can go without backwards incompatible changes.

this will introduce new Platform API version (although they won't be
used because we hardcode supported versions), and Buildpack API
versions.

Signed-off-by: Bohan Chen <bohanc@vmware.com>

hack/lifecycle/main.go

@@ -33,7 +33,7 @@ import (
 const (
 	lifecycleMetadataLabel = "io.buildpacks.lifecycle.metadata"
 	lifecycleLocation      = "/cnb/lifecycle/"
-	lifecycleVersion       = "0.16.0"
+	lifecycleVersion       = "0.17.2"
 )
 
 var (