Added composer scripts descriptions and misc composer config

Author: Ilyes512

composer.json

@@ -18,21 +18,29 @@
         "overtrue/phplint": "^4.1"
     },
     "scripts": {
+        "lint": "XDEBUG_MODE=off phplint --exclude=vendor .",
         "checkstyle": "XDEBUG_MODE=off ecs check --config=ecs-local.php",
         "fixstyle": "@checkstyle --fix",
-        "lint": "XDEBUG_MODE=off phplint --exclude=vendor .",
         "checkall": [
             "@lint",
             "@checkstyle",
             "composer outdated --direct",
             "composer outdated --direct --minor-only --strict"
         ]
     },
+    "scripts-descriptions": {
+        "lint": "Check all php files for syntax errors.",
+        "checkstyle": "Report on code style violations (without fixing it).",
+        "fixstyle": "Fixes code style violations.",
+        "checkall": "Run all code checkers (lint, checkstyle, outdated, ...)."
+    },
     "extra": {
         "branch-alias": {
             "dev-master": "1.0-dev"
         }
     },
+    "minimum-stability": "dev",
+    "prefer-stable": true,
     "config": {
         "sort-packages": true,
         "allow-plugins": {