Setup Travis CI (#23)

Author: thymikee

.travis.yml

@@ -0,0 +1,26 @@
+language: node_js
+node_js:
+- 8
+- 6
+before_install:
+- yarn global add greenkeeper-lockfile@1
+install: yarn --ignore-engines
+before_script: greenkeeper-lockfile-update
+script:
+- yarn lint && yarn flow && yarn test
+after_script: greenkeeper-lockfile-upload
+jobs:
+  include:
+  - stage: release
+    node_js: 8
+    os: linux
+cache:
+  yarn: true
+  directories:
+    - node_modules
+branches:
+  only:
+  - master
+  # Practical when batching releases
+  - next
+  - "/^greenkeeper/.*$/"