Update dependencies (#56)

Author: adroll-rtb-ci

rebar.config

@@ -32,7 +32,7 @@
 {alias, [{test, [format, lint, hank, xref, dialyzer, eunit, cover]}]}.
 
 {project_plugins,
- [{rebar3_hex, "~> 7.0.3"},
+ [{rebar3_hex, "~> 7.0.4"},
   {rebar3_format, "~> 1.2.1"},
   {rebar3_lint, "~> 2.0.1"},
   {rebar3_hank, "~> 1.3.0"},