update version to 0.5.1 (#157)

package.yaml

@@ -1,5 +1,5 @@
 name: simplex-chat
-version: 0.5.0
+version: 0.5.1
 #synopsis:
 #description:
 homepage: https://github.com/simplex-chat/simplex-chat#readme

src/Simplex/Chat/Controller.hs

@@ -26,7 +26,7 @@ import System.IO (Handle)
 import UnliftIO.STM
 
 versionNumber :: String
-versionNumber = "0.5.0"
+versionNumber = "0.5.1"
 
 data ChatConfig = ChatConfig
   { agentConfig :: AgentConfig,