Release version 0.9.3

Author: jplatte

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "env_logger"
 edition = "2018"
-version = "0.9.2"
+version = "0.9.3"
 license = "MIT OR Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/env-logger-rs/env_logger/"