Update: Update travis-deploy-once to version 5.0.9

Author: Markus Günther

package.json

@@ -53,7 +53,7 @@
     "rimraf": "^2.6.2",
     "semantic-release": "^15.12.0",
     "sinon": "^6.1.4",
-    "travis-deploy-once": "^5.0.2"
+    "travis-deploy-once": "^5.0.9"
   },
   "files": [
     "index.d.ts",