Bump axios from 0.19.2 to 0.21.2 in /demo/alipay-demo

Bumps [axios](https://github.com/axios/axios) from 0.19.2 to 0.21.2.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.21.2/CHANGELOG.md)
- [Commits](axios/axios@v0.19.2...v0.21.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

demo/alipay-demo/package-lock.json

@@ -9,7 +9,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "axios": "^0.19.2",
+    "axios": "^0.21.2",
     "axios-miniprogram-adapter": "^0.3.0"
   }
 }