[POC] light dependencies

[pythcoiner]

just a POC that :

• drop rayon
• drop all async dependencies
• replace reqwest by minreq + url

not tested btw, just to show a global approach

[Sosthene00]

Hi, I think you should have a look at #66
What would be the use case for a very light version of sp-client?

[pythcoiner]

Hi, I think you should have a look at #66

yes, this was just a quick shot, if there is interest of reducing the dependency tree, I can do it on top of #66

What would be the use case for a very light version of sp-client?

First get rid of async => I think forcing consumer to pull/run an async mechinery/runtime while it's not strictly necessary is a pain. Especially if you want to bind to a language that does not have native support for async.

Second: just keep a small dependency tree, I think it's always good on few aspects:

• Maintainability
• Security

[Sosthene00]

I think #74 solves this too