digestible-v0.2.3

• Implement Digestible for std::collections::{HashMap, HashSet}
• Implement Digestible for alloc::collections::{BTreeMap, BTreeSet, BinaryHeap, LinkedList, VecDeque}
• Implements Digestible serde_json::Value and serde_json::Number in serde_json feature
• Implements Digestible for uuid::Uuid in uuid feature
• Implements Digestible for chrono types in chrono feature
• More testing