language: elixir
elixir:
  - 1.4.5
  - 1.5.1
otp_release:
  - 19.3
  - 20.0
cache:
  directories:
    - _build
    - deps
before_script:
  - MIX_ENV=test mix compile --warnings-as-errors
script:
  - mix test

language: elixir
elixir:
  - 1.4.5
  - 1.5.1
otp_release:
  - 19.1
  - 19.3
  - 20.0
cache:
  directories:
    - _build
    - deps
before_script:
  - MIX_ENV=test mix compile --warnings-as-errors
script:
  - mix test

Add OTP 19.1 to test matrix
Add OTP 19.1 to test matrix

OTP 19.1 is the current minimum otp version as noted by issue #19.
