Bump phpunit to 6 - the last version that supports 7.0

vgarvardt · vgarvardt · commit 64b77d9b4dc4 · 2019-12-02T17:03:47.000+01:00
diff --git a/composer.json b/composer.json
@@ -28,7 +28,7 @@
   },
   "require-dev": {
     "friendsofphp/php-cs-fixer": "^2.3",
-    "phpunit/phpunit": "^5.7",
+    "phpunit/phpunit": "^6.5",
     "league/statsd": "^1.5"
   },
   "suggest": {
