message: Add a command to get the gzipped, minified size of the library.
diff: "lint": "tslint --project . --format stylish",
  "build": "npm run clean && tsc && npm run minify",
  "minify": "babel-minify lib/esm-amd-loader.js --outFile=lib/esm-amd-loader.min.js",
  + "get-size": "npm run build && cat lib/esm-amd-loader.min.js | gzip -9 > esm-amd-loader.min.js.gz && ls -a -l -h esm-amd-loader.min.js.gz && rm esm-amd-loader.min.js.gz",
  "test:integration": "npm run lint && npm run build && cd test/ && npm run test:wct",
  "test": "npm run test:integration",
  "prepack": "npm run build",
  