Added test-ffi target, use it in CI (#9)

* Added test-ffi target, use it in CI

* Added clang-format config, fixed RETURN_STRING API mismatch

* Skip installing php and packages on the PHP docker images

* Removed al2 job that was never going to work, and compiler tests

* Fixed basic test for extension loading

* Cleaned up lib structure, fixed tests

* use test-ci target to conditionally test in GitHub

* Use v0.8.1 of builder

lib/tests/ErrorTest.php

@@ -1,7 +1,5 @@
 <?php
 
-require_once('tests.inc');
-
 final class ErrorTest extends PHPUnit_Framework_TestCase {
     private static $crt = null;
     public static function setUpBeforeClass() {

lib/tests/EventLoopGroupTest.php

@@ -1,17 +1,15 @@
 <?php
 
-require_once('tests.inc');
-
 final class EventLoopGroupTest extends PHPUnit_Framework_TestCase {
 
     public function testLifetime() {
-        $elg = new EventLoopGroup(new EventLoopGroupOptions());
+        $elg = new EventLoopGroup();
         $elg = null;
     }
 
     public function testConstructionWithOptions() {
-        $options = new EventLoopGroupOptions();
-        $options->num_threads = 1;
+        $options = EventLoopGroup::defaults();
+        $options['num_threads'] = 1;
         $elg = new EventLoopGroup($options);
         $elg = null;
     }

lib/tests/tests.inc

@@ -1,9 +0,0 @@
-<?php
-
-// Ensure any version of PHPUnit works, since phpunit5 is the last one that
-// works with PHP5.6
-if (!class_exists('PHPUnit_Framework_TestCase') &&
-  class_exists('\\PHPUnit\\Framework\\TestCase')) {
-    abstract class PHPUnit_Framework_TestCase extends \PHPUnit\Framework\TestCase {
-    }
-}