add elvis config

Author: Licenser

elvis.config

@@ -0,0 +1,20 @@
+[
+ {
+   elvis,
+   [
+    {config,
+     [#{dirs => ["src", "test"],
+        ignore => [of_parser, of_lexer],
+        filter => "*.erl",
+        rules => [{elvis_style, line_length, #{limit => 80,
+                                               skip_comments => false}},
+                  %% ...
+                  {elvis_style, state_record_and_type},
+                  {elvis_style, no_spec_with_records}
+                 ]
+       }
+     ]
+    }
+   ]
+ }
+].