refactor: Upgrade to dev version again

* There is some issues [^1] in Beta. Besides, the "dev" version was working good, and the bugs fixed faster.
* Lock Twig to 3.14.*, because the newer Twig development version triggers the "Warning: Undefined variable $_vO" issue. I'm not sure why this occurs, and I cannot reproduce it in a clean project.

[^1] Uncaught Error: Too few arguments to function PHPStan\PhpDocParser\Parser\ConstExprParser::__construct(), 0 passed in /vendor/symfony/property-info/Extractor/PhpStanExtractor.php on line 82 and exactly 1 expected ["exception" => ArgumentCountError { …}]

Author: pan93412

composer.json

@@ -3,7 +3,7 @@
   "description": "The web application of Database Playground.",
   "type": "project",
   "license": "AGPL-3.0-or-later",
-  "minimum-stability": "beta",
+  "minimum-stability": "dev",
   "prefer-stable": false,
   "require": {
     "php": ">=8.3",
@@ -63,7 +63,7 @@
     "twig/extra-bundle": "3.*",
     "twig/markdown-extra": "3.*",
     "twig/string-extra": "3.*",
-    "twig/twig": "3.*"
+    "twig/twig": "3.14.*"
   },
   "config": {
     "allow-plugins": {