Add placeholders for minimum and next release versions.

README.md

@@ -140,15 +140,16 @@ instead of:
 Add the following to your aliases
 
 ```clojure
-:kibit {:extra-deps {jonase/kibit {:mvn/version "0.2.0"}}
+:kibit {:extra-deps {jonase/kibit {:mvn/version "0.X.Y"}}
         :exec-fn kibit.driver/exec
         :exec-args {:paths ["."]}
 ```
 
 Then run `clojure -X:kibit`. For more options, please see the
 docstring on `kibit.driver/exec`.
 
-**NOTE:** At least Clojure v1.9 is required to use this exec-fn method.
+**NOTE:** At least Clojure v1.9 and Kibit v0.X.Y are required to use this
+exec-fn method.
 
 For alternative options to use kibit from inside deps.edn, check out [this issue](https://github.com/clj-commons/kibit/issues/221)