IBX-71: Added taxonomy, tree-builder and content-tree packages (#21)

Author: webhdx

composer.json

@@ -26,6 +26,9 @@
         "ibexa/personalization-client": "^4.0.x-dev",
         "ibexa/version-comparison": "^4.0.x-dev",
         "ibexa/workflow": "^4.0.x-dev",
+        "ibexa/taxonomy": "^4.0.x-dev",
+        "ibexa/tree-builder": "^4.0.x-dev",
+        "ibexa/content-tree": "^4.0.x-dev",
         "ibexa/commerce-base-design": "^4.0.x-dev",
         "ibexa/commerce-checkout": "^4.0.x-dev",
         "ibexa/commerce-fieldtypes": "^4.0.x-dev",