Bump axios from 0.19.2 to 0.21.1

Bumps [axios](https://github.com/axios/axios) from 0.19.2 to 0.21.1.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.21.1/CHANGELOG.md)
- [Commits](axios/axios@v0.19.2...v0.21.1)

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

Author: dependabot[bot]

package-lock.json

@@ -51,7 +51,7 @@
     "@jupyterlab/notebook": "^3.0.11",
     "@lumino/application": "1.13.1",
     "@lumino/disposable": "^1.4.3",
-    "axios": "^0.19.2"
+    "axios": "^0.21.1"
   },
   "devDependencies": {
     "@jupyterlab/builder": "^3.0.0",