Cookiedb

Improvements

- [`443bea6`](https://github.com/jaedsonpys/cookiedb/commit/443bea6): Updating project requirements;
- [`72da046`](https://github.com/jaedsonpys/cookiedb/commit/72da046): Import `fernet` from `_document.py` file.

Improvements

- [`3859228`](https://github.com/jaedsonpys/cookiedb/commit/3859228): Removing CookieDB files from `database/` directory;
- [`31258a3`](https://github.com/jaedsonpys/cookiedb/commit/31258a3): Changing `cryptography` import in cookiedb.py.

Fix

- [`5439611`](https://github.com/jaedsonpys/cookiedb/commit/5439611): Changing condition to True if path getting is not None.

Aditions

- [`06cf483`](https://github.com/jaedsonpys/cookiedb/commit/06cf483): Adding method to close a open database.

Aditions

- [`0f3f795`](https://github.com/jaedsonpys/cookiedb/commit/0f3f795): Creating `ItemNotExistsError` exception;
- [`8dad755`](https://github.com/jaedsonpys/cookiedb/commit/8dad755): Adding `CookieDB.update` method to update existent items.

Fix

- [`f3804c1`](https://github.com/jaedsonpys/cookiedb/commit/f3804c1): Creating `InvalidDatabaseKeyError` exception;
- [`1aa48c2`](https://github.com/jaedsonpys/cookiedb/commit/1aa48c2): Checking database encrypt key in `open` method.