chore(package): update @semantic-release/npm to version 5.0.1

Closes #15

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
     "@semantic-release/changelog": "^2.0.1",
     "@semantic-release/git": "^4.0.1",
     "@semantic-release/github": "^4.0.0",
-    "@semantic-release/npm": "^3.0.0",
+    "@semantic-release/npm": "^5.0.1",
     "commitizen": "^2.9.6",
     "cz-conventional-changelog": "^2.1.0",
     "husky": "^0.14.3",