Initial attempt at adding Travis CI support

Author: jaredbiehler

.travis.yml

@@ -0,0 +1,16 @@
+sudo: false
+language: php
+php:
+  - '5.5'
+  - '5.6'
+  - '7.0'
+  - '7.1'
+  - hhvm
+before_script:
+  - composer self-update
+  - composer install --no-interaction
+script: vendor/bin/phpunit
+notifications:
+  email: false
+  slack:
+    secure: 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