v3.0

• C5 now targets .NET Standard 2.0, .NET 6.0 and .NET 8.0.
• Breaking change: Rec<T1, T2, ...> type removed. Use ValueTuple<T1, T2, ...> instead.
• Breaking change: All public readonly fields converted to properties.
• Breaking change: EventTypeEnum is now EventType.
• Breaking change: custom KeyValuePair<K, V> has been replaced by the standard System.Collections.Generic.KeyValue<TKey, TValue> for better compatibility.
• Breaking change: EnumerationDirection is now Direction.
• Breaking change: [Serializable] attribute removed. Cf. BinaryFormatter security guide.