Incorrect total in paging results from OffsetByPageNumberSpecification

[r0ss88]

Describe the bug
When using the OffsetByPageNumberSpecification I've found that the total count returned does not reflect the total amount of items.

As we can see in the above query, the total number of items is 6 yet the total has been calculated as 67.

To Reproduce

1. Add multiple types of items to the same container.
2. Create a specification for one of the item types inheriting from OffsetbyPageNumberSpecification. You shouldn't need to add any where predicate to replicate.
3. Call the specification with the Repository.QueryAsync method

Expected behavior
Total returned should be equal to the number of items of that type in the container

Actual behavior
Total returned will be equal to all the items in the container.

Additional context

The problem seems to stem from the count query being built without adding an additional filter for the "Type". There is obviously a simple workaround to this, modify every query to also include the type filter. However, this is implicitly done everywhere else by this package, so for that reason I deem this a bug.

[IEvangelist]

Great catch @r0ss88! It seems as though you're correct with this bug report, would you be interested in providing a pull request to fix this issue? I could assign this to you, if you're willing and able - just let me know.

@all-contributors please add @r0ss88 for bug.

[allcontributors]

@IEvangelist

I've put up a pull request to add @r0ss88! 🎉