Allow protocol to be set in RedisSettings

This requires at least redis 5.0.0 version

Author: drizzt

arq/connections.py

@@ -45,6 +45,7 @@ class RedisSettings:
     conn_retries: int = 5
     conn_retry_delay: int = 1
     max_connections: Optional[int] = None
+    protocol: Optional[int] = 2
 
     sentinel: bool = False
     sentinel_master: str = 'mymaster'
@@ -266,6 +267,7 @@ def pool_factory(*args: Any, **kwargs: Any) -> ArqRedis:
             retry_on_timeout=settings.retry_on_timeout,
             retry_on_error=settings.retry_on_error,
             max_connections=settings.max_connections,
+            protocol=settings.protocol,
         )
 
     while True:

pyproject.toml

@@ -38,7 +38,7 @@ classifiers = [
 ]
 requires-python = '>=3.8'
 dependencies = [
-    'redis[hiredis]>=4.2.0,<6',
+    'redis[hiredis]>=5.0.0,<6',
     'click>=8.0',
 ]
 optional-dependencies = {watch = ['watchfiles>=0.16'] }