Fix for compatibility with django 4, minor fix and context processor

[Ymil]

• Fix deprecated library for compatibility with django4
• Fix get_site_url for error with wordpress in subfolders
• Add wordpress_context_processor for access variables in templates

[Ymil]

This PR have changes of #15

[dellis23]

Thanks for doing this. I'm assuming you've tested it? Unfortunately I'm not much in a position to test this right now. I wonder if there's anyone else in the community that can double check and make sure everything runs correctly after integrating this PR? If so, I'll merge.

[dellis23]

Perhaps @ibaguio or @lylinquiman?

[Ymil]

Hi @dellis23, sorry for the mistake, @lylinquiman and me are the same person jeje :(

I've tested it using it, but it's a good idea to have other people try it.

[dellis23]

Haha, sounds good. Yeah if we can get one more person confirming it works, I'll merge.