Merge #373

373: Release hermit-sys 0.4.0 r=mkroening a=mkroening



Co-authored-by: Martin Kröning <mkroening@posteo.net>

hermit-sys/Cargo.toml

 [package]
 name = "hermit-sys"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Stefan Lankes"]
 license = "MIT/Apache-2.0"
 description = "FFI bindings to HermitCore"