Merge pull request #1241 from input-output-hk/jpraynaud/1219-bump-client-version

Upgrade client version to `0.4.0`

Author: jpraynaud

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "mithril-client"
-version = "0.3.45"
+version = "0.4.0"
 description = "A Mithril Client"
 authors = { workspace = true }
 edition = { workspace = true }