Switch from request to axios

[`request`](https://www.npmjs.com/package/request)
is deprecated and has several security vulnerabilities.

`axios` is the most popular request library for JavaScript.
It's used in `@redhat-developer/vscode-redhat-telemetry`,
so the total size of our dependencies should decrease.

Signed-off-by: David Thompson <[email protected]>

Author: datho7561