fixes php-cache/issues#40 (#79)

Author: prisis

composer.json

@@ -29,8 +29,7 @@
         "cache/taggable-cache": "^0.4"
     },
     "require-dev":       {
-        "phpunit/phpunit":         "^4.0 || ^5.1",
-        "cache/integration-tests": "^0.10"
+        "phpunit/phpunit":         "^4.0 || ^5.1"
     },
     "autoload":          {
         "psr-4":                 {