Replace deprecated request dependency

[perrin4869]

request was deprecated earlier this year. Moreover, it has dependencies on problematic modules like sshpk. It should be possible to migrate to bent by the same developer.
urllib could be replaced by bent as well, also removing problematic dependencies and reducing the SDK size.
Would you be willing to merge a PR implementing these changes?

[TheNorthMemory]

Here's another fully re-designed javascript SDK, less dependices(minimal only need axios). With yargs, it's possible play the OpenAPI requests over command line. Repo here: https://github.com/TheNorthMemory/whats-alipay