update radio_select_button_group widget to BS5

[nerdoc]

fixes #111

untested, but should work. I wrote this patch for django-bootstrap-v5, and I don't know why there are 2 projects. Is there a possibility to merge?

[dyve]

I don't know why there are 2 projects. Is there a possibility to merge?

Anyone is free to start a fork of any project. We'd welcome input from or merge with https://github.com/zelenij/django-bootstrap-v5/

[coveralls]

Pull Request Test Coverage Report for Build 2807774192

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 97.121%

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Totals
Change from base Build 2807763662:	0.0%
Covered Lines:	584
Relevant Lines:	597

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💛 - Coveralls

[dyve]

@nerdoc could you add a unit test for this?

[nerdoc]

I'm so busy ATM I'm afraid I won't be able do that in the next months... sorry. No problems to just leave it open until I find time.