Remove AWS key and secret from configuration

[acinader]

Instead let the aws sdk take care of credentials.

fixes: #20

[codecov]

Codecov Report

Merging #49 into master will decrease coverage by 30.49%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #49      +/-   ##
==========================================
- Coverage   93.98%   63.49%   -30.5%     
==========================================
  Files           2        2              
  Lines         133      126       -7     
  Branches       27       26       -1     
==========================================
- Hits          125       80      -45     
- Misses          8       46      +38

Impacted Files	Coverage Δ
lib/optionsFromArguments.js	87.27% <ø> (-9.34%)	⬇️
index.js	45.07% <ø> (-46.83%)	⬇️

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[flovilmart]

Should we put all options into a single object instead of having 2 arguments?

[acinader]

I think the most typical case will be configuration using the single string for the bucket name. But, let me re-look at it with your suggestion and also considering simplifying the code/better option/env handeling. I think that this can certainly be simplified. I don't think we want to publish this for a couple of weeks and I'm traveling, so may be a bit till I get to it...but I will.

[davimacedo]

Closing for being stale.