Add Redis 8.0 to CI test matrix (#210)

Redis 8.0 is now generally available, so let's test against it alongside
our existing Redis 6.2, 7.4, Valkey 8.0, and Memory backend matrix legs.

Tested locally - all 505 tests pass with 100% coverage.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: chrisguidry

.github/workflows/ci.yml

@@ -21,6 +21,9 @@ jobs:
           - name: "Redis 7.4, redis-py >=5"
             redis-version: "7.4"
             redis-py-version: ">=5"
+          - name: "Redis 8.0, redis-py >=5"
+            redis-version: "8.0"
+            redis-py-version: ">=5"
           - name: "Valkey 8.0, redis-py >=5"
             redis-version: "valkey-8.0"
             redis-py-version: ">=5"

README.md

@@ -82,7 +82,7 @@ pip install pydocket
 ```
 
 Docket requires a [Redis](http://redis.io/) server with Streams support (which was
-introduced in Redis 5.0.0). Docket is tested with Redis 6 and 7.
+introduced in Redis 5.0.0). Docket is tested with Redis 6, 7, and 8.
 
 For testing without Redis, Docket includes [fakeredis](https://github.com/cunla/fakeredis-py) for in-memory operation:
 

docs/getting-started.md

@@ -21,7 +21,7 @@ With `pip`:
 pip install pydocket
 ```
 
-You'll also need a [Redis](http://redis.io/) server with Streams support (Redis 5.0+). Docket is tested with Redis 6 and 7, and also works with [Valkey](https://valkey.io/).
+You'll also need a [Redis](http://redis.io/) server with Streams support (Redis 5.0+). Docket is tested with Redis 6, 7, and 8, and also works with [Valkey](https://valkey.io/).
 
 ## Your First Docket
 

docs/index.md

@@ -66,6 +66,6 @@ docket integrates two modes of task execution:
 2. **Scheduled tasks** are pushed onto a Redis sorted set with a schedule time. A loop within each worker moves scheduled tasks onto the stream when their schedule time has arrived. This move is performed as a Lua script to ensure atomicity.
 
 Docket requires a [Redis](http://redis.io/) server with Streams support (which was
-introduced in Redis 5.0.0). Docket is tested with Redis 6 and 7.
+introduced in Redis 5.0.0). Docket is tested with Redis 6, 7, and 8.
 
 For more detailed information, check out our [Getting Started](getting-started.md) guide or dive into the [API Reference](api-reference.md).