Merge pull request #7 from http-rs/revert-dev-iteration-version

revert dev iteration version

Author: yoshuawuyts

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "async-sse"
-version = "4.0.1-alpha.0"
+version = "4.0.0"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/http-rs/async-sse"
 documentation = "https://docs.rs/async-sse"