Bump axios from 0.18.0 to 0.21.2

Bumps [axios](https://github.com/axios/axios) from 0.18.0 to 0.21.2.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/master/CHANGELOG.md)
- [Commits](axios/axios@v0.18.0...v0.21.2)

---
updated-dependencies:
- dependency-name: axios
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package.json

@@ -8,7 +8,7 @@
     "lint": "vue-cli-service lint"
   },
   "dependencies": {
-    "axios": "^0.18.0",
+    "axios": "^0.21.2",
     "echarts": "^5.2.2",
     "eslint": "^5.9.0",
     "highlight.js": "^9.13.1",