Add travis ci

.travis.yml

@@ -0,0 +1,35 @@
+language: php
+php:
+  - '7.0'
+  - '7.1'
+  - '7.2'
+  - nightly
+
+cache:
+  directories:
+    - vendor
+    - $HOME/.composer
+
+env:
+  global:
+    - DEFAULT_COMPOSER_FLAGS="--optimize-autoloader --no-interaction --no-progress"
+
+before_script:
+  - composer global show hirak/prestissimo -q || travis_retry composer global require $DEFAULT_COMPOSER_FLAGS hirak/prestissimo
+  - composer install --no-interaction
+
+stages:
+  - Static Code Analysis
+  - Test
+
+jobs:
+  include:
+    - stage: Static Code Analysis
+      php: 7.2
+      script:
+        - vendor/bin/php-cs-fixer fix -v --dry-run
+    - stage: Test
+      script:
+        - vendor/bin/phpunit
+  allow_failures:
+    - php: nightly