chore(package): update del to version 5.0.0

Closes #121

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
     "babel-preset-stage-1": "^6.24.1",
     "babel-register": "^6.24.1",
     "chai": "^4.1.2",
-    "del": "^3.0.0",
+    "del": "^5.0.0",
     "eslint": "^4.2.0",
     "eslint-config-strict": "^14.0.0",
     "eslint-plugin-import": "^2.7.0",