OJS scraper does not scrape maajournal

[fnielsen]

Describe the bug
OJS scraper does not scrape maajournal at issue https://www.maajournal.com/index.php/maa/issue/view/38 or paper https://www.maajournal.com/index.php/maa/article/view/978 level

To Reproduce
Steps to reproduce the behavior:

1. python -m scholia.scrape.ojs paper-url-to-quickstatements https://www.maajournal.com/index.php/maa/article/view/978
2. Limit amount of quickstatements generated

Expected behavior
Full quickstatements generated.