Bug: error sending request for url

Summary: unable to call API via fossapi CLI

Installation:
`curl --proto '=https' --tlsv1.2 -LsSf https://github.com/fossas/fossapi/releases/latest/download/fossapi-installer.sh | sh`

Configuration:
`% export FOSSA_API_KEY=`

Invocation:
```
% fossapi list projects

Error: HTTP error: error sending request for url (https://app.fossa.com/api/v2/projects?page=1&count=20)
```

Debug:
* I opened that URL in the browser and found I was able to connect and fetch the page.
* I tried two different API keys

Start by reproducing `fossapi list projects` with `FOSSA_API_KEY` set, then trace the request to `https://app.fossa.com/api/v2/projects?page=1&count=20`. Compare the CLI's request behavior with the successful browser request and investigate why the command reports an HTTP sending error. Done means the command can fetch projects using a valid API key and the failure is covered by an appropriate verification.

Written by the indexing model from the issue text.