Macro updt

macro_rules! updt {
    ($($tt:tt)*) => { ... };
}

Example

use fire_postgres::updt;
let a = &"val".to_string();
let b = &"val2".to_string();
let query = updt!{
	a,
	"b": b
}.into_query();

assert_eq!(r#""a" = $1, "b" = $2"#, query.sql().to_string().trim());