dyn_trie 4.0.0

Dynamic trie is trie capable of mapping any T to any char iterator.
Documentation 
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## Dynamic Trie

Dynamic trie is trie that allows mapping of any T to any char iterator with asymptotical computational complexity based on that of `std::collections::HashMap`.

Node occurs for each `char` as defined by Rust language.

```rust
let mut trie = Trie::<char>::new();

let some = "información meteorológica".chars();
trie.ins('🌩', some.clone());

let one_more = "alimentación RSS".chars();
trie.ins('😋', one_more.clone());

assert_eq!(RemRes::Ok('😋'), trie.rem(one_more.clone()));
assert_eq!(AcqRes::Err(KeyErr::Unknown), trie.acq(one_more.clone()));

let mut res = trie.acq_mut(some.clone());
assert_eq!(AcqMutRes::Ok(&mut '🌩'), res);
let entry = res.uproot();
*entry = '🌞';

assert_eq!(AcqRes::Ok(&'🌞'), trie.acq(some.clone()));
```