Add fix for instance creation

[envis10n]

Applied formatting
Added unit test for instance creation and usage

This fixes #2 which is caused by the Object.assign using the base axiod object's functions, which all refer to axiod.request

Doing this, it will always be calling with the regular defaults, since there is no actual inheritance involved with the axiod.create method. My fix here is quick and dirty, but I think binding this as the new instance and using this in the function calls could fix this much more cleanly.

[netroy]

@roonie007 can we please have this merged ?

[envis10n]

@roonie007 can we please have this merged ?

If you desperately need to use it before being merged, I have it forked over on my profile and you can use the raw link in your project. I may end up making some more adjustments and then publishing my own version to deno.land/x/ since this seems to be abandoned or no longer a focus of the creator.

[roonie007]

@netroy @envis10n Done :D