Add eqwalizer dependency

Author: robertoaloi

rebar.config

@@ -5,7 +5,21 @@
            ]
 }.
 
-{deps, []}.
+{deps, [
+  {eqwalizer_support,
+    {git_subdir,
+        "https://github.com/whatsapp/eqwalizer.git",
+        {branch, "main"},
+        "eqwalizer_support"}}
+]}.
+
+{project_plugins, [
+  {eqwalizer_rebar3,
+    {git_subdir,
+        "https://github.com/whatsapp/eqwalizer.git",
+        {branch, "main"},
+        "eqwalizer_rebar3"}}
+]}.
 
 {dialyzer, [ {warnings, [unknown]}
            , {plt_apps, all_deps}