Fix Dynamic Supervisor Init typespec - Issue #181

[scudelletti]

Hello! 👋

This PR fixes issue #181.

Currently horde has a few typespecs errors and one of them is in the init function inside the Horde.DynamicSupervisor.

This fix reduces the total amount of typespec errors from 10 to 6.
To see the errors I suggest you to run dialyzer in the test environment(MIX_ENV=test mix dialyzer) since the tests contain code that uses the library giving more context to dialyzer.

Thanks for you time and thank you very much for maintaining Horde! It's an awesome library! 🎉

[derekkraan]

Thanks for the PR. I have simplified the spec to {:ok, options()} | :ignore. I'm not sure what dialyzer meant by adding all those other extra things to the callback, but this also seems to satisfy dialyzer.

[anthonator]

Would it be possible to get a patch release of this?

[KamilZielinski]

@anthonator No patch so far but there's 0.8.0-rc.1 which seems to contain these changes. You may want to try it out