fix(adapter-fetch): Correctly handle Request instance passed into fetch

[offirgolan]

Description

Correctly handle passing a Request instance to fetch.

fetch(new Request('/api/foo', { method: 'POST' }), { body: 'bar' });

Motivation and Context

Resolves #255.

The approach taken to solve for this is by patching the global Request class and storing the passed in url and options. This allows us to not only have direct access to the passed in body (e.g. no need to re-read it off the Request instance) but also not needing to hardcode which properties to take off the instance.

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have added tests to cover my changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• My code follows the code style of this project.
• My commits and the title of this PR follow the Conventional Commits Specification.
• I have read the contributing guidelines.

[jasonmit]

Looks good, just tests are failing in CI.

[jasonmit]

Nice catch

[jasonmit]