message: make it easier to run node tests in just this package
diff: "scripts": {
  "build": "ember build",
  "start": "ember server",
  - "test": "ember try:each"
  + "test": "ember try:each",
  + "node-tests": "mocha ../test-support/bin/run.js"
  },
  "dependencies": {
  "@cardstack/di": "^0.2.4",
  