Enhancement: Run 'composer validate' as part of the build

Author: localheinz

build.xml

@@ -2,6 +2,7 @@
 <project name="Extra strict and opinionated rules for PHPStan" default="check">
 
 	<target name="check" depends="
+		composer-validate,
 		composer,
 		lint,
 		cs,
@@ -10,6 +11,18 @@
 		phpstan
 	"/>
 
+	<target name="composer-validate">
+		<exec
+				executable="composer"
+				logoutput="true"
+				passthru="true"
+				checkreturn="true"
+		>
+			<arg value="validate"/>
+			<arg value="--ansi"/>
+		</exec>
+	</target>
+
 	<target name="composer">
 		<exec
 				executable="composer"