Leftover from 4712fc6

Author: sebastianbergmann

composer.json

@@ -20,6 +20,8 @@
         "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
         "irc": "irc://irc.freenode.net/phpunit"
     },
+    "minimum-stability": "dev",
+    "prefer-stable": true,
     "require": {
         "php": "^5.6 || ^7.0",
         "phpunit/php-file-iterator": "~1.3",