Remove obsolete dev dependency. Update phpunit.

mcordingley · web-flow · commit 0506acf525bf · 2018-09-21T23:26:17.000-04:00
diff --git a/composer.json b/composer.json
@@ -16,8 +16,7 @@
         "php": "^7.0.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.5.3",
-        "codeclimate/php-test-reporter": "dev-master"
+        "phpunit/phpunit": "^6.0.0"
     },
     "autoload": {
         "psr-4": {
