chore(package): update axios to version 0.19.1

Closes #9

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
   },
   "devDependencies": {
     "ava": "^0.23.0",
-    "axios": "^0.17.0",
+    "axios": "^0.19.1",
     "eslint": "^4.9.0",
     "eslint-config-standard": "^10.2.1",
     "eslint-plugin-import": "^2.8.0",