Include composer dependencies in repo

vendor/ramsey/array_column/.travis.yml

@@ -0,0 +1,26 @@
+language: php
+
+php:
+  - 5.3
+  - 5.4
+  - 5.5
+  - 5.6
+  - 7.0
+  - hhvm
+
+before_script:
+  - travis_retry composer self-update
+  - travis_retry composer install --no-interaction --prefer-source
+
+script:
+  - mkdir -p build/logs
+  - ./vendor/bin/parallel-lint src tests
+  - ./vendor/bin/phpunit --coverage-text
+  - ./vendor/bin/phpcs src --standard=psr2 -sp
+
+after_script:
+  - php vendor/bin/coveralls
+
+matrix:
+  allow_failures:
+    - php: hhvm