Bump client to v0.9.0

Author: mxpv

crates/client/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "containerd-client"
-version = "0.8.0"
+version = "0.9.0"
 authors = [
   "Maksym Pavlenko <pavlenko.maksym@gmail.com>",
   "The containerd Authors",