Add a GH workflow to test LWP::Curl

[codecov[bot]]

Codecov Report

Base: 86.93% // Head: 86.93% // No change to project coverage :thumbsup:

Coverage data is based on head (2ac5246) compared to base (4a7a729). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #116 +/- ## ======================================= Coverage 86.93% 86.93% ======================================= Files 48 48 Lines 1776 1776 Branches 462 462 ======================================= Hits 1544 1544 Misses 81 81 Partials 151 151 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=libwww-perl). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=libwww-perl)

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[oalders]

Right now it's only started manually because it would break the build -- this was under the assumption that we were going to fix whatever broke LWP::Curl. Now that we've established that LWP::Curl is broken, I should probably amend this PR to use other downstream deps that aren't broken.

[simbabque]

ping :)