Update to HTTP v1 and drop support for older versions of HTTP

[github-actions]

This pull request changes the compat entry for the HTTP package from 0.9.3 to 0.9.3, 1.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

Fixes #10.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (84ead00) 94.20% compared to head (8993939) 94.20%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master       #7   +/-   ##
=======================================
  Coverage   94.20%   94.20%           
=======================================
  Files           4        4           
  Lines          69       69           
=======================================
  Hits           65       65           
  Misses          4        4           

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[DilumAluthge]

Any particular reason we need to drop support for Julia 1.5?

[devmotion]

HTTP 1.0.0 (and newer versions) only support Julia >= 1.6: https://github.com/JuliaHealth/SMARTBackendServices.jl/actions/runs/7945106077/job/21691345682 https://github.com/JuliaWeb/HTTP.jl/blob/6ec44e203977f4abee28fd80adfbf351a1c6629b/Project.toml

[DilumAluthge]

Ah, I see. That's unfortunate, but not much we can do about it.

[devmotion]

If we drop Julia 1.5, we have to update the branch protection settings and change the Julia 1.5 CI requirement to Julia 1.6. Alternatively, we could add a finalize Github action and make it the only requirement.

[DilumAluthge]

Yeah let's take advantage of the opportunity to move to a finalize job.

[DilumAluthge]

@devmotion While we're at it, can you make a PR to migrate to GitHub merge queue?

[devmotion]

#11