v2.3.0

• Adding the tree/cursor.clone and the tree/cursor.deepClone methods.
• Adding the tree/cursor.pop and the tree/cursor.shift methods.
• Adding a way to disable a single monkey's immutability.
• Fixing an issue where the tree.commit method would fire a useless update.
• Fixing an issue related to updates and dynamic paths.
• Fixing the tree/cursor.splice to correctly handle negative indexes.
• Fixing a bug related to eager monkeys and immutability.