[composer] Set dependencies for 3.0.6 release.

Author: Łukasz Serwatka

composer.json

@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "ezsystems/ezplatform-kernel": "^1.0@dev",
+        "ezsystems/ezplatform-kernel": "^1.0",
         "twig/twig": "^3.0",
         "symfony/dependency-injection": "^5.0",
         "symfony/http-kernel": "^5.0",
@@ -26,7 +26,7 @@
         "symfony/templating": "^5.0"
     },
     "require-dev": {
-        "ezsystems/doctrine-dbal-schema": "^1.0@dev",
+        "ezsystems/doctrine-dbal-schema": "^1.0",
         "ezsystems/ezplatform-code-style": "^1.0",
         "phpunit/phpunit": "^8.1",
         "friendsofphp/php-cs-fixer": "^2.16.0",
@@ -62,4 +62,4 @@
             "composer/package-versions-deprecated": true
         }
     }
-}
+}