⬆️ Bump axios from 0.15.3 to 0.19.0 in /examples/reactapp

Bumps [axios](https://github.com/axios/axios) from 0.15.3 to 0.19.0.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/master/CHANGELOG.md)
- [Commits](https://github.com/axios/axios/compare/v0.15.3...v0.19.0)

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

examples/reactapp/package.json

@@ -22,7 +22,7 @@
   },
   "dependencies": {
     "antd": "^2.12.1",
-    "axios": "^0.15.3",
+    "axios": "^0.19.0",
     "isomorphic-fetch": "^2.2.1",
     "less": "^2.7.1",
     "lodash": "^4.16.4",