Update package and composer versions

Author: lcharette

composer.json

@@ -37,8 +37,6 @@
         "mockery/mockery": "^1.2",
         "fakerphp/faker": "^1.17"
     },
-    "minimum-stability": "dev",
-    "prefer-stable": true,
     "autoload": {
         "psr-4": {
             "UserFrosting\\Theme\\AdminLTE\\": "app/src/"