Union With Slice And Number

Test Data:

```json
[
   1,
   2,
   3,
   4,
   5
]
```

Selector:

```
$[1:3,4]
```

Result (Proposal A):

```diff
--- Expected
+++ Actual
@@ @@
-'[2,3,5]'
+'[2,3]'
```

https://cburgmer.github.io/json-path-comparison/results/union_with_slice_and_number.html