Bump axios from 0.20.0 to 0.21.1

Bumps [axios](https://github.com/axios/axios) from 0.20.0 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](https://github.com/axios/axios/compare/v0.20.0...v0.21.1)

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

package.json

@@ -6,7 +6,7 @@
     "start": "serve __sapper__/export"
   },
   "dependencies": {
-    "axios": "^0.20.0",
+    "axios": "^0.21.1",
     "compression": "^1.7.1",
     "dayjs": "^1.9.7",
     "highlight.js": "^10.4.1",