Fix npm run package

Apparently `ncc` no longer knows the `--license` option.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

package.json

@@ -9,7 +9,7 @@
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts",
     "lint": "eslint **/*.ts",
-    "package": "ncc build --source-map --license licenses.txt",
+    "package": "ncc build --source-map",
     "test": "jest",
     "all": "npm run build && npm run format && npm run lint && npm run package && npm test"
   },