v0.1.0 - Initial Release

Initial release of imcache -- a tiny, zero-dependency, generic, sharded,
thread-safe in-memory cache for Go 1.26+.

Features

• Generic Cache[V any] with full type safety
• Sharded locking (256 shards by default) for high-concurrency workloads
• TTL expiry (lazy on Get + periodic janitor sweeps)
• Optional per-shard LRU eviction with O(1) performance
• Atomic GetOrSet, SetIfAbsent, Peek
• Range iterators via iter.Seq2 / iter.Seq
• Lock-free hit/miss/eviction stats
• Eviction callbacks
• Zero external dependencies -- standard library only

Benchmarks

See BENCHMARKS.md
for comparative benchmarks against sync.Map, go-cache, golang-lru, bigcache,
and freecache.