don't require any datafusion features (#60)

Author: davidhewitt

Cargo.toml

@@ -11,7 +11,7 @@ repository = "https://github.com/datafusion-contrib/datafusion-functions-json/"
 rust-version = "1.79.0"
 
 [dependencies]
-datafusion = "43"
+datafusion = { version = "43", default-features = false }
 jiter = "0.5"
 paste = "1"
 log = "0.4"