Merge pull request #37 from cgwalters/drop-msrv

Drop MSRV to 1.58

Author: cgwalters

Cargo.toml

@@ -5,7 +5,7 @@ repository = "https://github.com/coreos/stream-metadata-rust"
 version = "0.1.0"
 edition = "2021"
 license = "Apache-2.0"
-rust-version = "1.60.0"
+rust-version = "1.58.0"
 
 [dependencies]
 serde = { version = "^1.0", features = ["derive"] }