true / false filters not applying

[rbibby]

What is the issue?

When trying to filter on archived status on the PSS endpoints, the filter is not being applied when using true and false. Using true and false as strings (ie. 'true' & 'false') does work.

Steps To Reproduce

Doesn't apply filter:

$filters = [];
$filters['archived'] = true;
$pageNumber = $request->input('page', 1);
$requests = $pssClient->getRequests($pageNumber, 15, $filters);

Does apply filter:

$filters = [];
$filters['archived'] = 'true';
$pageNumber = $request->input('page', 1);
$requests = $pssClient->getRequests($pageNumber, 15, $filters);

Expected behaviour

true and false should work in the same way that 'true' and 'false' would

[rbibby]

I think this is caused by line 40 of /src/PaginationUrl.php

Running urlencode on a boolean would result in 0 or 1, neither of which are picked up by filtering on the API. It has to be true or false.