chore(package): update dependencies

Author: greenkeeper[bot]

package.json

@@ -16,13 +16,13 @@
   "devDependencies": {
     "eslint": "^4.1.0",
     "eslint-config-prettier": "^2.4.0",
-    "eslint-config-xo": "^0.18.2",
+    "eslint-config-xo": "^0.19.0",
     "eslint-plugin-prettier": "^2.2.0",
     "husky": "^0.14.3",
     "jest": "^21.0.0",
     "jest-cli": "^21.0.0",
     "lint-staged": "^4.2.1",
-    "nsp": "^2.6.3",
+    "nsp": "^3.1.0",
     "prettier": "^1.7.0",
     "yeoman-assert": "^3.1.0",
     "yeoman-test": "^1.7.0"