Merge pull request #303 from openscd/fix-license

fix(package.json): update license property

Author: mandurisaimounika

package.json

@@ -12,7 +12,7 @@
     "editor"
   ],
   "author": "OMICRON electronics GmbH",
-  "license": "UNLICENSED",
+  "license": "Apache-2.0",
   "main": "open-scd.js",
   "module": "open-scd.js",
   "type": "module",