chore(package): update del-cli to version 3.0.0

Closes #40

Author: greenkeeper[bot]

package.json

@@ -48,7 +48,7 @@
     "babel-preset-env": "^1.6.1",
     "cpy-cli": "^1.0.1",
     "cross-env": "^5.1.3",
-    "del-cli": "^1.1.0",
+    "del-cli": "^3.0.0",
     "eslint": "^4.13.1",
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-config-prettier": "^2.9.0",