Don't crash on rebar3's pkg aliases

[sstrigler]

rebar3 allows dependency declarations like

{deps,[
  {rebar, {pkg, rebar_fork}}, % rebar app under a different pkg name
]}

elvis crashes at a declaration like this

# rebar.config [FAIL]
Error: 'badarg' while applying rule 'protocol_for_deps_rebar'.
# rebar.config [FAIL]
Error: 'badarg' while applying rule 'protocol_for_deps_rebar'.

This fix prevents elvis from crashing and accepts the declaration as valid.

[elbrujohalcon]

Thank you @sstrigler :)

[sstrigler]

That was fast 😂

On 13 juli 2016, at 16:11, Brujo Benavides [email protected] wrote:

Merged #52 #52.

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