Set up Travis CI to run a quick test

Author: nicwortel

.travis.yml

@@ -0,0 +1,13 @@
+language: php
+
+php:
+  - 7.1
+  - 7.2
+
+cache:
+  directories:
+    - $HOME/.composer/cache
+
+install: composer install
+
+script: vendor/bin/phpcs --standard=src/LEVIY/ruleset.xml tests/

tests/Foo.php

@@ -0,0 +1,16 @@
+<?php
+declare(strict_types=1);
+
+namespace Bar;
+
+use DateTime;
+
+final class Foo
+{
+    private const NOW = 'now';
+
+    public function getDate(): DateTime
+    {
+        return new DateTime(self::NOW);
+    }
+}