chore: Release v0.4.0

updates strum, strum_macros to v0.26.2

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 edition = "2021"
 name = "nftables"
-version = "0.3.0"
+version = "0.4.0"
 license = "MIT OR Apache-2.0"
 description = "Safe abstraction for nftables JSON API. It can be used to create nftables rulesets in Rust and parse existing nftables rulesets from JSON."
 homepage = "https://namib.me/"
@@ -18,8 +18,8 @@ exclude = [
 serde = { version = "1.0.137", features = ["derive"] }
 serde_json = { version = "1.0.81" }
 serde_path_to_error = "0.1"
-strum = "0.25"
-strum_macros = "0.25"
+strum = "0.26.2"
+strum_macros = "0.26.2"
 thiserror = "1.0"
 
 [dev-dependencies]