Bump axios from 0.17.1 to 0.18.1 (#24)

Bumps [axios](https://github.com/axios/axios) from 0.17.1 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@v0.17.1...v0.18.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -49,7 +49,7 @@
   },
   "devDependencies": {
     "@babel/preset-env": "^7.3.4",
-    "axios": "^0.17.1",
+    "axios": "^0.18.1",
     "axios-mock-adapter": "^1.16.0",
     "codecov": "^3.2.0",
     "cross-env": "^5.1.6",