Remove unbound version constraints from composer.json (#508)

composer.json

@@ -52,25 +52,25 @@
         "sensio/framework-extra-bundle": "^5.5",
         "sentry/sentry-symfony": "^3.4",
         "stevenmaguire/oauth2-bitbucket": "^3.0",
-        "symfony/amazon-mailer": "*",
-        "symfony/asset": "*",
-        "symfony/console": "*",
-        "symfony/doctrine-messenger": "*",
-        "symfony/dotenv": "*",
+        "symfony/amazon-mailer": "5.3.*",
+        "symfony/asset": "5.3.*",
+        "symfony/console": "5.3.*",
+        "symfony/doctrine-messenger": "5.3.*",
+        "symfony/dotenv": "5.3.*",
         "symfony/flex": "^1.3.1",
-        "symfony/form": "*",
-        "symfony/framework-bundle": "*",
-        "symfony/http-client": "*",
+        "symfony/form": "5.3.*",
+        "symfony/framework-bundle": "5.3.*",
+        "symfony/http-client": "5.3.*",
         "symfony/intl": "5.3.*",
-        "symfony/lock": "*",
-        "symfony/mailer": "*",
-        "symfony/messenger": "*",
+        "symfony/lock": "5.3.*",
+        "symfony/mailer": "5.3.*",
+        "symfony/messenger": "5.3.*",
         "symfony/monolog-bundle": "^3.5",
-        "symfony/process": "*",
-        "symfony/security-bundle": "*",
-        "symfony/twig-bundle": "*",
-        "symfony/validator": "*",
-        "symfony/yaml": "*",
+        "symfony/process": "5.3.*",
+        "symfony/security-bundle": "5.3.*",
+        "symfony/twig-bundle": "5.3.*",
+        "symfony/validator": "5.3.*",
+        "symfony/yaml": "5.3.*",
         "twig/extra-bundle": "^2.12 || ^3.0",
         "twig/twig": "^2.12 || ^3.0"
     },