message: Specify `dist/blockstack.js` in package.json `browser` field
diff: "version": "19.0.0-alpha.5",
  "description": "The Blockstack Javascript library for authentication, identity, and storage.",
  "main": "lib/index",
  + "browser": "dist/blockstack.js",
  "scripts": {
  "browserify": "rm -rf ./dist/blockstack.js && browserify src/index.js --standalone blockstack -o ./dist/blockstack.js",
  "browserify-tests": "browserify src/index.js --debug --standalone blockstack -o ./tests/browserTests/bundle.js",
  