Consider a FixerClient to seperate the HTTP infrastructure code.

[naveddeshmukh]

FixerClient will act as a wrapper around HttpClient, this will help in following

• Allows to neatly implement a Singleton access to HttpClient.
• Moves GetFixerUrl from Fixer Facade
• Allows to expose a public method such as UseHttps() to support https connection Support https connections to API #11

[rmorrin]

I like this idea 👍

I may not have much time to work on this with the holiday period coming up, but if you'd like to raise a PR, or even some sample code in here I'd be happy to take a look 😃

I'd like to keep the public API as small as possible and have the Fixer class manage all singleton access to this new FixerClient if possible, though I think this is what you're suggesting anyway!

Cheers.