message: Add `yarn watch` script
  This makes iteration during development significantly quicker
diff: "vscode:prepublish": "gulp build",
  "build": "gulp build",
  "test": "node ./out/test/runTest.js",
  - "forceprettier": "gulp forceprettier"
  + "forceprettier": "gulp forceprettier",
  + "watch": "npx webpack -c webpack.dev.js --watch"
  },
  "dependencies": {
  "diff-match-patch": "1.0.5",
  