{
  "name": "grunt-rollup",
  "description": "Grunt plugin for rollup - next-generation ES6 module bundler",
  "version": "0.3.0",
  "homepage": "https://github.com/chrisprice/grunt-rollup",
  "author": {
    "name": "Chris Price",
    "email": "price.c@gmail.com",
    "url": "http://chrisprice.io"
  },
  "repository": {
    "type": "git",
    "url": "git://github.com/chrisprice/grunt-rollup.git"
  },
  "bugs": {
    "url": "https://github.com/chrisprice/grunt-rollup/issues"
  },
  "license": "MIT",
  "engines": {
    "node": ">= 0.8.0"
  },
  "scripts": {
    "test": "grunt test"
  },
  "devDependencies": {
    "grunt-contrib-jshint": "^0.9.2",
    "grunt-contrib-clean": "^0.5.0",
    "grunt-contrib-nodeunit": "^0.3.3",
    "grunt": "~0.4.5"
  },
  "peerDependencies": {
    "grunt": "~0.4.5"
  },
  "keywords": [
    "gruntplugin",
    "rollup"
  ],
  "dependencies": {
    "promise": "^7.0.4",
    "rollup": "^0.16.3"
  }
}

{
  "name": "grunt-rollup",
  "description": "Grunt plugin for rollup - next-generation ES6 module bundler",
  "version": "0.3.0",
  "homepage": "https://github.com/chrisprice/grunt-rollup",
  "author": {
    "name": "Chris Price",
    "email": "price.c@gmail.com",
    "url": "http://chrisprice.io"
  },
  "repository": {
    "type": "git",
    "url": "git://github.com/chrisprice/grunt-rollup.git"
  },
  "bugs": {
    "url": "https://github.com/chrisprice/grunt-rollup/issues"
  },
  "license": "MIT",
  "engines": {
    "node": ">= 0.8.0"
  },
  "scripts": {
    "test": "grunt test"
  },
  "devDependencies": {
    "grunt-contrib-jshint": "^0.9.2",
    "grunt-contrib-clean": "^0.5.0",
    "grunt-contrib-nodeunit": "^0.3.3",
    "grunt": "~0.4.5"
  },
  "peerDependencies": {
    "grunt": "~0.4.5"
  },
  "keywords": [
    "gruntplugin",
    "rollup"
  ],
  "dependencies": {
    "promise": "^7.0.4",
    "rollup": "^0.x"
  }
}

Make rollup update through minor versions even while in pre-release
Make rollup update through minor versions even while in pre-release

as per https://docs.npmjs.com/misc/semver#caret-ranges-1-2-3-0-2-5-0-0-4