Bump version to 2.5.0

Author: Stefan Wille

README.md

@@ -28,7 +28,7 @@ Add it to your `shard.yml`:
 dependencies:
   redis:
     github: stefanwille/crystal-redis
-    version: ~> 2.4.1
+    version: ~> 2.5.0
 ```
 
 and then install the library into your project:

shard.yml

@@ -1,5 +1,5 @@
 name: redis
-version: 2.4.1
+version: 2.5.0
 
 authors:
   - Stefan Wille <nospam-post@nospam-stefanwille-dot-com>