concurrent query CountDocuments

[hhow09]

Is your feature request related to a problem? Please describe.
in func (paging *pagingQuery) Find(), Paging(...) could be executed concurrently with Find()

Describe the solution you'd like

func (paging *pagingQuery) Find() (paginatedData *PaginatedData, err error) {
         ...
	paginationInfoChan := make(chan *Paginator, 1)
	go Paging(paging, paginationInfoChan, false, 0)
        ...
}

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
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