Change package name to actual plugin name

Installing the plugin via Composer leads to inconsistent directory
layout and potentially overwrites a different plugin.

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "wp-liveticker",
+  "name": "stklcode-liveticker",
   "version": "1.0.0",
   "description": "A simple Liveticker for Wordpress.",
   "author": "Stefan Kalscheuer",