chore: bump to 0.4.5 for release

Signed-off-by: Brooks Townsend <brooks@cosmonic.com>

Author: brooksmtownsend

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "nkeys"
-version = "0.4.4"
+version = "0.4.5"
 authors = ["wasmCloud Team"]
 edition = "2021"
 description = "Rust implementation of the NATS nkeys library"