v2.5.1

What's changed

• Fix ConcurrentLfu time-based expiry policy failing to update the entry's expiry on read. Prior to this fix, expiry is only updated when the read buffer is processed (following a cache write, or when the read buffer is full).
• Fix ConcurrentLru torn writes for large structs using SeqLock.
• Fix torn writes for 64-bit current time on 32-bit platforms for ConcurrentLru AfterAccessPolicy and DiscretePolicy.
• P/Invoke TickCount64 to evaluate current time for .NET Standard on Windows, Duration.SinceEpoch is 5x faster resulting in lower latency lookups for ConcurrentTLru/ConcurrentTLfu.
• Use Stopwatch.GetTimestamp to evaluate current time on MacOS, Duration.SinceEpoch is about 20% faster resulting in slightly lower latency lookups for ConcurrentTLru/ConcurrentTLfu.

Full changelog: v2.5.0...v2.5.1