Minor Docblock fixes for @param and @return tags

[czim]

PHPStorm (and other IDEs) tend to give incorrect warnings due to the incorrect doc blocks. This PR fixes the following:

• IDEs not understanding Restable fluent syntax (such as for Restable::listing([])->render(), fixed by updating the listing() @return tag).
• IDEs incorrectly warning that non-array parameters for many methods are not accepted (whereas objects with toArray() methods are supported).

These fixes only affect doc blocks, no functionality or other comments are affected.

[czim]

Not to be rude, but is this project discontinued? This PR literally changes nothing but a few docblocks and has been sitting here for the better part of a year...

If this is an unacceptable update, please let me know why and what needs to be done to fix it.