Update package.xml -> composer.json

Aleksander Machniak

2014-12-10 1143428dcb70976ced8e33c47c71685d5757cca5

 plugins/additional_message_headers/composer.json

@@ -2,7 +2,7 @@
    "name": "roundcube/additional_message_headers",
    "type": "roundcube-plugin",
    "description": "Very simple plugin which will add additional headers to or remove them from outgoing messages.",
    "license": "GNU GPL v2",
    "license": "GPLv2",
    "version": "1.2.0",
    "authors": [
        {