message: fix(interactjs/packages.json): set main field
  Re:
diff: "type": "git",
  "url": "https://github.com/taye/interact.js.git"
  },
  + "main": "dist/interact.js",
  "browser": "dist/interact.js",
  "description": "Drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE9+)",
  "homepage": "https://interactjs.io",
  