Bump axios from 0.16.1 to 0.18.1

Bumps [axios](https://github.com/axios/axios) from 0.16.1 to 0.18.1.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.18.1/CHANGELOG.md)
- [Commits](axios/axios@v0.16.1...v0.18.1)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -5,7 +5,7 @@
   "description": "React Weather component",
   "main": "lib/js/ReactWeather.js",
   "dependencies": {
-    "axios": "^0.16.1",
+    "axios": "^0.18.1",
     "moment": "^2.18.1",
     "react": "~15.4.1",
     "react-dom": "~15.4.1"