language: elixir
elixir:
  - 1.3.0
  - 1.3.1
  - 1.3.2
  - 1.4.0
  - 1.4.1
  - 1.4.2
  - 1.5.0
otp_release:
  - 18.2.1
  - 19.0.2
  - 19.2
  - 19.3

language: elixir
elixir:
  - 1.3.4
  - 1.4.5
  - 1.5.0
  - 1.5.1
otp_release:
  - 18.2.1 
  - 18.3
  - 19.2
  - 19.3
  - 20.0

Update elixir & otp build matrix
Update elixir & otp build matrix