Run tests in parallel (#170)

* Run tests in parallel

* Disable/enable some services

* Do not install redis on PHP 5.6

* Run composer update

* Install redis 3.0.0

* Enable redis extension but do not install

* Bugfix

* force instsall dependencies

* Force install stuff

* Fixes

* Minors

* Updated deps

* Debub

* Coverage fix

* Reduce sleep

* Because... you know

* Sleep less

* Applied changes from StyleCI

* Applied changes from StyleCI

Author: Nyholm

Tests/CreatePoolTrait.php

@@ -35,7 +35,7 @@ public function createSimpleCache()
     private function getFilesystem()
     {
         if ($this->filesystem === null) {
-            $this->filesystem = new Filesystem(new Local(__DIR__.'/'));
+            $this->filesystem = new Filesystem(new Local(__DIR__.'/cache'.rand(1, 100000)));
         }
 
         return $this->filesystem;

composer.json

@@ -4,6 +4,7 @@
     "type":              "library",
     "license":           "MIT",
     "minimum-stability": "dev",
+    "prefer-stable":     true,
     "keywords":          [
         "cache",
         "psr-6",
@@ -31,7 +32,7 @@
         "league/flysystem":     "^1.0"
     },
     "require-dev":       {
-        "phpunit/phpunit":         "^4.0 || ^5.1",
+        "phpunit/phpunit":         "^5.7.21",
         "cache/integration-tests": "^0.16"
     },
     "provide":           {