elixir: updated to 1.11.3

v1.11.3

1. Enhancements

Elixir

[Macro] Add Macro.unique_var/2 and Macro.generate_unique_arguments/2

2. Bug fixes

Elixir

[Code] Do not raise when checking for operator ambiguity when :static_atoms_encoder is set in Code.string_to_quoted
[Kernel] Emit undefined function warnings from with
[Kernel] Do not fail type checking when literals are used in guards
[Module] Do not warn for attributes used in @after_compile
[Record] Make sure nested record names do not clobber each other

ExUnit

[ExUnit.Assertions] Do not crash if there are macros and module attributes on the left side of ++

IEx

[IEx.Helpers] Do not use Unicode chars if ANSI is disabled

Mix

[mix deps.compile] Fix compatibility with rebar v3.14
[mix release] Do not use private ram_file:compress/1
[mix xref] Do not crash when retrieving calls for modules in memory

(adam)