Pagination improvement use dict of ints and expect it everywhere

[igieon]

• default PAGE_SIZE can disable pagination only when is requested
• tests

[coveralls]

Pull Request Test Coverage Report for Build 1191242996

• 10 of 10 (100.0%) changed or added relevant lines in 3 files are covered.
• 43 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.1%) to 83.206%

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Files with Coverage Reduction	New Missed Lines	%
flask_combo_jsonapi/querystring.py	1	93.88%
flask_combo_jsonapi/data_layers/alchemy.py	5	83.87%
flask_combo_jsonapi/resource.py	6	91.16%
flask_combo_jsonapi/api.py	31	45.97%

Totals
Change from base Build 939390445:	0.1%
Covered Lines:	1308
Relevant Lines:	1572

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💛 - Coveralls

[mahenzon]

Hi! Why do you suggest disabling default pagination?

[igieon]

I have request from our PO that for small API we don't need pagination currently pagination can't by disabled with global settings this patch just change this so you can put as default PAGE_SIZE=0.

[mahenzon]

great

[mahenzon]

hey, sorry for a delay, it's a good feature. thank you for your contribution!