The `toHaveLength` matcher in `custom-jquery-matchers` doesn't work as
expected for generic Array-like objects with a `length` property,
whereas Jest's version does.

The reason is that the former wraps the value with jQuery, which only
correctly wraps _some_ Array-like objects, like true arrays, `jQuery
instances, `NodeList`s and `HTMLCollection`s.

As such, Jest's version is more widely useful, and is otherwise
equivalent, so it should be used instead.