[filter] Filter sensitive data in request url

[gullitmiranda]

There are cases where the url may contain sensitive information, so I made a change to apply the filter also in the request url.

For example, in this case it is necessary to replace the project_id.

[
  {
    "request": {
      // ...
      "url": "https://api.keen.io/3.0/projects/[project_id]/events/start"
    },
    // ...
  }
]

[parroty]

Thanks. It addresses #18, correct?

[gullitmiranda]

Yes. sorry, I had not looked at the issues. I ended up making the change by necessity itself and decided to submit.
I believe this completely solve the need reported in issue #18.

[parroty]

Great. Thanks!