Update version to 2.6.0 and require PHP 7.2

Author: marc1706

composer.json

@@ -3,7 +3,7 @@
 	"type": "phpbb-extension",
 	"description": "phpBB Ideas centre",
 	"homepage": "https://www.phpbb.com",
-	"version": "2.5.0",
+	"version": "2.6.0",
 	"license": "GPL-2.0-only",
 	"authors": [
 		{
@@ -34,7 +34,7 @@
 		}
 	],
 	"require": {
-		"php": ">=7.1.3",
+		"php": "^7.2 || ^8.0.0",
 		"composer/installers": "~1.0"
 	},
 	"extra": {