set up travis

Author: mateusjatenee

.travis.yml

@@ -0,0 +1,25 @@
+language: php
+
+sudo: false
+
+git:
+  depth: 2
+
+matrix:
+  include:
+    - php: 7.0
+    - php: 7.1
+    - php: nightly
+  fast_finish: true
+
+cache:
+  directories:
+    - $HOME/.composer/cache
+
+before_script:
+  - phpenv config-rm xdebug.ini || true
+  - travis_retry composer self-update
+  - travis_retry composer install --no-interaction
+
+script:
+  - composer test