Update to Poison >= 3

[mrusme]

mix deps.get is complaining locally, that ex_twilio requires an older version of Poison:

Running dependency resolution...

Failed to use "poison" (version 3.1.0) because
  ecto (version 2.1.4) requires ~> 2.2 or ~> 3.0
  ex_twilio (version 0.3.0) requires ~> 2.2
  maru (version 0.11.4) requires ~> 1.5 or ~> 2.0 or ~> 3.0
  mix.lock specifies 3.1.0

** (Mix) Hex dependency resolution failed, relax the version requirements of your dependencies or unlock them (by using mix deps.update or mix deps.unlock). If you are unable to resolve the conflicts you can try overriding with {:dependency, "~> 1.0", override: true}

Of course one can override with {:poison, "~> 3.1", override: true}, but it would be nicer, if ex_twilio would get upgraded to support ~> 3.0.

[pablo-co]

+1

[andrewshatnyy]

I think this is addressed already 1f1e35b#diff-6023be6004fce4718dad3dafb576d258R23

[mrusme]

@andrewshatnyy nice, thank you! Now all what's missing is an actual release of the latest ex_twilio code in order to be able to benefit from it. :-)

[danielberkompas]

I've released a new version: 0.4.0. Sorry for the delay, guys.

[mrusme]

@danielberkompas thank you Sir!