chore(ci): Add .travis.yml

Author: unicodeveloper

.travis.yml

@@ -0,0 +1,23 @@
+language: php
+
+php:
+  - 5.5
+  - 5.6
+  - 7.0
+  - hhvm
+
+matrix:
+    allow_failures:
+        - php: hhvm
+
+install: travis_retry composer install --no-interaction --prefer-source
+
+script:
+  - phpunit --coverage-text --coverage-clover=coverage.clover
+
+after_script:
+  - wget https://scrutinizer-ci.com/ocular.phar
+  - php ocular.phar code-coverage:upload --format=php-clover coverage.clover
+
+notifications:
+  slack: red-creek:5lI8ybvl6YTcCNPosh4TE13h