v2.9.7

What's Changed

• move tox to py39 by @daniyalzade in #247
• Fix incorrect calling of get_fieldsets by @augustobmoura in #286
• Fix Typo by @tony in #271
• fix tox and add more python/django version suite tests by @gutierri in #295
• docs: add infos about custom form and stacked/tabular class by @gutierri in #294
• cleaning test deps by @gutierri in #303

Full Changelog: v2.9.6...v2.9.7