Fix Elixir 1.17 deprecation in Pigeon 1.6.x

[nathany-copia]

#258

[egze]

Please merge it. cc @hpopp

[hpopp]

Thanks!

[nathany-copia]

Thank you!

[nathany-copia]

We're using this until 1.6.3 comes out -- for anyone else who needs this patch.

# Waiting for Pigeon 1.6.x release with Elixir 1.17 support.
{:pigeon, "~> 1.6.2", github: "codedge-llc/pigeon", ref: "6bc63f2"},

[hpopp]

Went ahead and published 1.6.3 🚀

[valerio-pizzichini]

@hpopp @nathany-copia Thank you very much for your work on this issue!
We are currently using the version 2.0.0 due to some nice features we have foreseen, would it be possible to add the same fixes on the master branch?

I can open a PR on master branch with the fix if you wish 🙏