language: ruby
cache: bundler
rvm:
  - 2.2.6
  - 2.3.1
  - 2.3.2
  - 2.3.3
matrix:
  fast_finish: true
env:
  global:
    - APPBOY_GROUP_ID="fakegroupid"
    - APPBOY_TEST_SEGMENT="fakesegment"

language: ruby
cache: bundler
rvm:
  - 2.2.6
  - 2.3.1
  - 2.3.2
  - 2.3.3
  - 2.4.0
matrix:
  fast_finish: true
env:
  global:
    - APPBOY_GROUP_ID="fakegroupid"
    - APPBOY_TEST_SEGMENT="fakesegment"

Add ruby 2.4.0 to Travis config
Add ruby 2.4.0 to Travis config
