Fix rust impl. version format

tom91136 · tom91136 · commit e21134d53814 · 2021-12-22T13:13:03.000Z
diff --git a/src/rust/rust-stream/Cargo.toml b/src/rust/rust-stream/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rust-stream"
-version = "4.0"
+version = "4.0.0"
 authors = ["Wei-Chen Lin <wl14928@bristol.ac.uk>"]
 edition = "2018"
 
