Remove deprecations to_{binary => string}
Merge pull request #1 from elia/patch-1

Remove deprecations to_{binary => string}
*: update to latest Elixir
Fix JSON.decode call
Support default headers
mix: update dependencies
Return default headers on error too
Add cross-origin options
Fix some issues with fail/success
Fix disabled cross-origin code
Handle Allow-Origin properly
More CORS stuff
Add some documentation
Add support for multiple adapters
Use find_value instead of reduce in prepare_response
Some API changes
Update mix dependencies
Add support for options on verb
mix: bump Elixir version and update dependencies
examples: update example