Allow symfony/process 5

GrahamCampbell · sebastianbergmann · commit 16e54fbc971c · 2019-11-18T20:26:59.000+01:00
diff --git a/composer.json b/composer.json
@@ -19,7 +19,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^7.5 || ^8.0",
-        "symfony/process": "^2 || ^3.3 || ^4"
+        "symfony/process": "^2 || ^3.3 || ^4 || ^5"
     },
     "autoload": {
         "classmap": [
