Upgrade to PHP 8.1 and higher.

.gitignore

@@ -1,6 +1,6 @@
 /.idea
-/bin/phing
+/bin/
 /composer.lock
 /custom.task.properties
 /custom.type.properties
-/vendor
+/vendor

build.xml

@@ -1,10 +1,26 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project name="Phing Extensions" default="build"  basedir=".">
-    <target name="build"/>
+    <target name="build">
+        <echo message="Noting to do."/>
+    </target>
 
     <!-- Run composer update -->
     <target name="update">
-        <exec command="composer update" checkreturn="true" passthru="true"/>
+        <exec executable="composer" checkreturn="true" passthru="true">
+            <arg value="--ansi"/>
+            <arg value="update"/>
+        </exec>
+
+        <phing phingfile="build.xml" target="outdated" haltonfailure="true"/>
+    </target>
+
+    <!-- Show outdated packages -->
+    <target name="outdated">
+        <exec executable="composer" checkreturn="false" passthru="true">
+            <arg value="--ansi"/>
+            <arg value="outdated"/>
+            <arg value="--direct"/>
+        </exec>
     </target>
 
     <!-- Runs all unit tests -->

composer.json

@@ -9,9 +9,9 @@
   "minimum-stability": "dev",
   "prefer-stable": true,
   "require": {
-    "php": ">=7.4",
-    "phing/phing": "^3.0.0",
-    "setbased/helper-program-execution": "^1.0"
+    "php": ">=8.1",
+    "phing/phing": "^3.0.0-RC4",
+    "setbased/helper-program-execution": "^1.2.0"
   },
   "autoload": {
     "psr-4": {
@@ -20,6 +20,9 @@
   },
   "config": {
     "bin-dir": "bin/",
-    "sort-packages": true
+    "sort-packages": true,
+    "allow-plugins": {
+      "phing/phing-composer-configurator": true
+    }
   }
 }