message: gltfpack: Update npm version to 0.15.1
  This is to fix the I/O issue with node.js and small files.
diff: {
  "name": "gltfpack",
  - "version": "0.15.0",
  + "version": "0.15.1",
  "description": "A command-line tool that can optimize glTF files for size and speed",
  "author": "Arseny Kapoulkine",
  "license": "MIT",
  