`@vercel/python` has been incorrectly "unquoting" the incoming request
URL for all Python interfaces (basic, WSGI, ASGI). The proper behavior is
to pass along the request URL to the serverless function handler unmodified.
This is proven by the additional test that is added in this PR, which actually
fires up the corresponding Python server via i.e. `python3 api/asgi.py`,
and executes the test probes defined in the
`test/fixtures/00-request-path/vercel.json` file. Adding this test ensures
that the request URL behavior of `@vercel/python` matches the behavior
as compared to executing via `python` directly.
We renamed the GitHub repository from `zeit/now` to `vercel/vercel` so this PR updates all references to the repo URL.
There were also a few remaining references to Now CLI that have been updated to Vercel CLI.
Previously, the changelog script was looking for the last "Publish Stable" commit, but it should really be looking for the last Stable release of Now CLI.
This PR updates the changelog script so that it fetches the latest GH Release (which should be Now CLI) and then compares that to the HEAD.
