opentelemetry-instrumentation-falcon: expand supported version to v4

[stevapple]

Description

Falcon v4 has a mostly identical interface to v3, and is proved to be fully compatible with opentelemetry-instrumentation-falcon. Loose the version check to <5.0.0 to avoid false DependencyConflict alarm, and fix the tests for v3.1.2+.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Local testing shows that the package is compatible with Falcon v4.

Does This PR Require a Core Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[emdneto]

Thanks.
you need to update pyproject.toml file with the new version, runtox -e generate and commit the changes. In that case, it's necessary to add tests to CI -- Add test-requirements.txt with the respective package version and include a new entry in tox.ini file

I'm writing a guideline in CONTRIBUTING.md to make this more clear.
EDIT: #3090 Some guidance here

[stevapple]

@emdneto Thank you for the guidance! Please check out if it's now fix. I regerated the docs and tests according to your new PR.

[xrmx]

@stevapple Would be nice if you'll test things before opening PRs, thanks.

[stevapple]

@stevapple Would be nice if you'll test things before opening PRs, thanks.

It took some time as I failed to set up tox for the project on Windows, and it turns out that the only breaking changes happened in v3.1.2 instead of v4. I've add test presets for both of them.