Allow underscores in atom for the linter

Author: NelsonVides

rebar.config

@@ -43,7 +43,12 @@
         dirs => ["src/**"],
         filter => "*.erl",
         ruleset => erl_files,
-        rules => [{elvis_style, private_data_types, disable}]
+        rules => [
+            {elvis_style, private_data_types, disable},
+            {elvis_style, atom_naming_convention, #{
+                regex => "^([a-z][a-zA-Z0-9_]*_?)*$"
+            }}
+        ]
     },
     #{
         dirs => ["."],