Handle relative paths according to RFC3986

[powerivq]

PR Checklist:

• I have run npm test locally and all tests are passing.
• I have added/updated tests for any new behavior.
  
• If this is a significant change, an issue has already been created where the problem / solution was discussed: Dot segments (/./ or /../) in URI not transformed before sending the request out #2981
  

PR Description

Fixes the issue described on #2981

This PR removes dot segments (/./ and /../) according to rfc3986 and adds corresponding tests.

[reconbot]

url.format would be the way to solve this but it's a breaking change, and request is now in maintenance mode and wont be merging any new features or breaking changes. Please see #3142 for more information.