message: bump underscore
diff: "requires": {
  "esprima": "1.2.2",
  "static-eval": "2.0.2",
  - "underscore": "1.7.0"
  + "underscore": "^1.12.1"
  },
  "dependencies": {
  "esprima": {
  "version": "3.12.1",
  "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.12.1.tgz",
  "integrity": "sha512-o8lHP20KjIiQe5b/67Rh68xEGRrc2SRsCuuoYclXXoC74AfSRGblU1HKzJWH3HxPZ+Ort85fWHpSX7KwBUC9CQ==",
  - "dev": true,
  "optional": true
  },
  "underscore": {
  - "version": "1.7.0",
  - "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.7.0.tgz",
  - "integrity": "sha1-a7rwh3UA02vjTsqlhODbn+8DUgk=",
  + "version": "1.12.1",
  + "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.12.1.tgz",
  + "integrity": "sha512-hEQt0+ZLDVUMhebKxL4x1BTtDY7bavVofhZ9KZ4aI26X9SRaE+Y3m83XUL1UP2jn8ynjndwCCpEHdUG+9pP1Tw==",
  "dev": true
  },
  "union-value": {
  