Switch to json request

[bojihao]

No description provided.

[bojihao]

resolves #320

[alandtse]

Thanks. Did you confirm this doesn't break something like standard login logout?

[alandtse]

You should only mark it as closing issues on relevant libraries. Timdorr's repo is a documentation library so merging this in won't "close" that issue for them.

May also close #316

[bojihao]

Hi @alandtse , I've removed the links to other repos. I verified the change in the context of Home Assistant including the situation where access token is refreshed. By looking through the code I did not find anything that may break. It seems to me that the change does not affect login/logout, which invokes self.websession.get/post directly instead of the custom ones self.get/post.

[alandtse]

Ok. Great. Thanks for figuring this out and testing it.