v2.5.3

• General code cleanup

v2.5.2

• rust_decimal::Decimal is now exposed

v2.5.1

• new opposite method on Side

v2.5.0

• new function OrderBook::get_highest_priority_price

v2.4.0

• new function OrderBook::get_highest_priority_price_quantity

v2.3.0

• new function OrderBook::get_highest_priority_order

v2.2.1

• OrderBook now implements Send

v2.2.0

• OrderBook is now generic over each orders ID allowing use of custom ID type instead of hard coded u128

v2.1.3

• used generics to simplify BookSide
• code clean up

v2.1.2

• changed internal search tree implementation
• lots of code simplification