Update composer.json [ci skip]

Author: iMattPro

composer.json

@@ -3,7 +3,7 @@
 	"type": "phpbb-extension",
 	"description": "Centralized GDPR-compliant consent and deferred script loading for phpBB forums.",
 	"homepage": "https://www.phpbb.com/",
-	"version": "1.0.0-a1",
+	"version": "0.1.0-dev",
 	"keywords": ["phpbb", "extension", "gdpr", "consent", "cookies"],
 	"license": "GPL-2.0-only",
 	"authors": [
@@ -16,6 +16,9 @@
 		"php": ">=7.1.3",
 		"composer/installers": "~1.0"
 	},
+	"require-dev": {
+		"phing/phing": "~2.4"
+	},
 	"extra": {
 		"display-name": "Consent Manager",
 		"soft-require": {