Include all core Elixir apps in PLT

[ericentin]

Seems like all the apps from the core Elixir distribution should be in the PLT?

[axelson]

Thanks for this change! ❤️

[lukaszsamson]

Shouldn't core erlang apps like :kernel, :compiler and :stdlib be included as well? Also I'm not sure if :iex is rely needed.

[ericentin]

Shouldn't core erlang apps like :kernel, :compiler and :stdlib be included as well? Also I'm not sure if :iex is rely needed.

It seems to me that the core erlang stuff is already included by dialyzer itself, but maybe not? :iex does have an API though (https://hexdocs.pm/iex) and can be called by code that is analyzed by the language server.

[lukaszsamson]

I'm not sure about that given the recent elixir PR https://github.com/elixir-lang/elixir/pull/9975/files

Regarding :iex and other optional apps, it probably won't hurt but IMO if an app uses other app's api, it should list it in the dependences. In fact elixir 1.11 will emit a warning in that case.

[axelson]

Removing :iex is a good point. Although it seems like we should we just match the updated list from that PR.