Resolve more RuboCop offenses

Change `MultilineMethodCallIndentation` from default to `indented`.
It'll help with future `LineLength` offenses.

Author: AlexWayfer

.rubocop.yml

@@ -11,6 +11,9 @@ Layout/EmptyLinesAroundArguments:
 Layout/FirstHashElementIndentation:
   EnforcedStyle: consistent
 
+Layout/MultilineMethodCallIndentation:
+  EnforcedStyle: indented
+
 Metrics/BlockLength:
   Exclude:
     - spec/**/*

lib/grape-swagger/representable/parser.rb

@@ -112,9 +112,11 @@ def parse_representer(representer)
           property[property_name] = parse_representer_property(value)
         end
 
-        required = representer.map
-                              .select { |value| value[:documentation] && value[:documentation][:required] }
-                              .map { |value| value[:as] || value.name }
+        required =
+          representer
+            .map
+            .select { |value| value[:documentation] && value[:documentation][:required] }
+            .map { |value| value[:as] || value.name }
 
         [properties, required]
       end