Total pages field returns null in category query

[Serunde]

Preconditions

1. Using Magento 2.3
2. Luma sample data installed

Steps to reproduce

1. Form a category query with an inner product query using the page_info field
2. Include total_pages

Expected result

The returned value of total_pages should be equivalent to Math.ceil([# of products] / [page size])

Actual result

[naydav]

https://github.com/magento/graphql-ce/pull/219/files