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](https://github.com/axios/axios/compare/v0.19.2...v0.21.1)

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

package.json

@@ -14,7 +14,7 @@
     "@vuepress/plugin-blog": "^1.9.2",
     "@vuepress/plugin-google-analytics": "^1.4.1",
     "@vuepress/plugin-pwa": "^1.4.1",
-    "axios": "^0.19.2",
+    "axios": "^0.21.1",
     "file-saver": "^2.0.2",
     "flexsearch": "nextapps-de/flexsearch",
     "js-cookie": "^2.2.1",