release: v0.4.9

Bump version to 0.4.9

Signed-off-by: Tim Zhang <tim@hyper.sh>

Author: Tim-Zhang

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ttrpc"
-version = "0.4.8"
+version = "0.4.9"
 authors = ["The AntFin Kata Team <kata@list.alibaba-inc.com>"]
 edition = "2018"
 license = "Apache-2.0"