keep version consistent, correct feature flag
Could not compile with `features = ["derive"]`. Needed it to be `features = ["specs-derive"]`.
@@ -58,7 +58,7 @@ But first, you will need to enable the `derive` feature:
```toml
[dependencies]
-specs = { version = "0.15.0", features = ["derive"] }
+specs = { version = "0.16.1", features = ["specs-derive"] }
```
Now you can do this:
