Release v0.4.0

Signed-off-by: alindima <alin@parity.io>

Author: alindima

CHANGELOG.md

@@ -1,6 +1,9 @@
-# Upcoming Release
+# v0.4.0
 
+## Changed
 - Seccomp is now activated via the seccomp syscall, not prctl
+
+## Added
 - A new Error::Seccomp variant is added to indictate seccomp syscall failures
 - Add `apply_filter_all_threads` convenience function which uses the seccomp
   TSYNC feature to synchronize all threads in the process to the same filter

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "seccompiler"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Amazon Firecracker Team <firecracker-maintainers@amazon.com>"]
 description = "Provides easy-to-use seccomp-bpf jailing."
 repository = "https://github.com/rust-vmm/seccompiler"