Show that we support runtime 5.3 (#40)

Nyholm · web-flow · commit 66d94d5cba11 · 2021-04-29T10:57:08.000+02:00
diff --git a/composer.json b/composer.json
@@ -12,7 +12,7 @@
     "require": {
         "php": ">=7.2.5",
         "ext-json": "*",
-        "symfony/runtime": "5.x-dev"
+        "symfony/runtime": "^5.3"
     },
     "require-dev": {
         "symfony/phpunit-bridge": "^5.2"
