`not-{before,after}?` broken for equal arguments that need coercion

Related https://github.com/dm3/clojure.java-time/issues/104

Broken by https://github.com/dm3/clojure.java-time/commit/24388e8eeaba3e251cc6fa0a96bc6f01ee48e849

```clojure
(is (j/<= (j/day-of-week :saturday) :saturday))
(is (j/>= (j/day-of-week :saturday) :saturday))
```