phpunit/phpunit version update.

ivopetkov · ivopetkov · commit 000db286f22e · 2018-07-12T21:08:03.000+03:00
diff --git a/composer.json b/composer.json
@@ -16,7 +16,7 @@
         "ivopetkov/html5-dom-document-php": "^0.5.5|0.6.*"
     },
     "require-dev": {
-        "phpunit/phpunit": "7.*"
+        "phpunit/phpunit": "6.*"
     },
     "autoload": {
         "files": ["autoload.php"]
