Release 0.4.0-beta.1

Author: afilini

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "electrum-client"
-version = "0.3.0-beta.1"
+version = "0.4.0-beta.1"
 authors = ["Alekos Filini <alekos.filini@gmail.com>"]
 license = "MIT"
 homepage = "https://github.com/MagicalBitcoin/rust-electrum-client"