Add coherence-go-client (#5083)

Author: Tim Middleton

README.md

@@ -645,6 +645,7 @@ _Data stores with expiring records, in-memory distributed data stores, or in-mem
 - [cache2go](https://github.com/muesli/cache2go) - In-memory key:value cache which supports automatic invalidation based on timeouts.
 - [cachego](https://github.com/faabiosr/cachego) - Golang Cache component for multiple drivers.
 - [clusteredBigCache](https://github.com/oaStuff/clusteredBigCache) - BigCache with clustering support and individual item expiration.
+- [coherence-go-client](https://github.com/oracle/coherence-go-client) - Full implementation of Oracle Coherence cache API for Go applications using gRPC as network transport.
 - [couchcache](https://github.com/codingsince1985/couchcache) - RESTful caching micro-service backed by Couchbase server.
 - [fastcache](https://github.com/VictoriaMetrics/fastcache) - fast thread-safe inmemory cache for big number of entries. Minimizes GC overhead.
 - [GCache](https://github.com/bluele/gcache) - Cache library with support for expirable Cache, LFU, LRU and ARC.