literally 0.1.3

When you literally just want a literal of the std::collections types.

# use std::collections::{HashMap, HashSet};
# use literally::{hmap, hset};
let m: HashMap<String, HashSet<String>> = hmap!{
    "key" => hset!{
        "value"
    }
};
assert_eq!(m.get("key").unwrap().get("value"), Some(&"value".to_string()))