`xpath/select-all` shouldn't be evaluated lazily

In the following example the behavior of `xpath/select-all` seems unintuitive because of lazyness:

```
(let [comp (tu/mount a-div-containing-component)
divs-before (xpath/select-all comp (xpath/>> ** "div"))
comp (send-message!! comp :destroy-all-divs)]
(assert (pos? (count divs-before))))
```

Assuming the `div-containing-component` contains at least one div before sending the message and zero after. `divs-before` returns an empty list, since the query is evaluated after all divs where destroyed. That said, the assertion will fail. Wrapping it in `(doall (xpath/select-all ...))` fixes the problem.

I'd expect `xpath/select-all` to be evaluated eagerly.