chore(package): update semantic-release to version 15.4.4

Closes #29

Author: greenkeeper[bot]

package.json

@@ -75,7 +75,7 @@
     "markdown-magic-dependency-table": "1.3.2",
     "markdown-magic-package-scripts": "1.2.1",
     "nsp": "3.1.0",
-    "semantic-release": "15.0.0",
+    "semantic-release": "15.4.4",
     "standard-version": "4.3.0",
     "travis-deploy-once": "4.3.4"
   },