Remove unused istanbul and lodash.reduce dependencies

Author: kadamwhite

package.json

@@ -80,12 +80,10 @@
  "grunt-cli": "^1.2.0",
  "grunt-contrib-clean": "^1.0.0",
  "grunt-zip": "^0.17.1",
- "istanbul": "^0.4.4",
  "jest": "^23.6.0",
  "jsdoc": "^3.4.3",
  "kramed": "^0.5.6",
  "load-grunt-tasks": "^3.5.0",
- "lodash.reduce": "^4.6.0",
  "minami": "^1.2.3",
  "minimist": "^1.2.0",
  "prompt": "^1.0.0",