version bump for next release

Cargo.toml

@@ -3,15 +3,15 @@ authors = ["Jason Ozias <jason.g.ozias@gmail.com>"]
 categories = ["development-tools", "development-tools::build-utils"]
 description = "Generate 'cargo:rustc-env' instructions via 'build.rs' for use in your code via the env! macro"
 documentation = "http://docs.rs/vergen"
-edition = "2018"
+edition = "2021"
 homepage = "http://github.com/rustyhorde/vergen"
 keywords = ["cargo", "instructions", "build", "tool"]
 license = "MIT OR Apache-2.0"
 name = "vergen"
 readme = "README.md"
 repository = "https://github.com/rustyhorde/vergen"
 resolver = "2"
-version = "7.3.2"
+version = "7.4.0"
 
 [package.metadata.cargo-all-features]
 denylist = ["local_offset","time","git2","rustc_version","sysinfo"]