message: Expand gltfpackjs build script to test abspath
  We also now confirm the existence of pirate.glb on the host filesystem.
diff: @@ -108,6 +108,8 @@ jobs:
  - name: test
  run: |
  node gltf/cli.js -i demo/pirate.obj -o pirate.glb -v
  + node gltf/cli.js -i `pwd`/pirate.glb -o pirate-repack.glb -cc -v
  + wc -c pirate.glb pirate-repack.glb
  node js/meshopt_decoder.test.js
  - name: npm pack
  run: cd gltf && npm pack
  