Fix a typo on documentation.
@@ -48,7 +48,7 @@ actix-web = "2.0.0"
actix-rt = "1.0.0"
actix-http = "1.0"
async-std = "1.5"
-# Force the version os async-io.
+# Force the version on async-io. This solves a dependency issue on socket2.
async-io = "=1.3.1"
env_logger = "0.7"
err-derive = "0.2"
