Release request

[paulo-ferraz-oliveira]

Would it be possible to tag a release, here and in Hex.pm?

Many thanks.

Note: I'm testing this with OTP 24, and may have found some issues.

• [x] wait on https://github.com/inaka/apns4erl/pull/249 being merged
• [ ] wait on https://github.com/inaka/apns4erl/pull/246 being merged
• [x] make sure the imported gun version doesn't mention erlang:get_stacktrace