Add newline to embedded model enum

Author: deanWombourne

src/main/resources/handlebars/swift4/modelInlineEnumDeclaration.mustache

@@ -1,3 +1,3 @@
     public enum {{enumName}}: {{#isNot this 'container'}}{{datatype}}{{/isNot}}{{#is this 'container'}}String{{/is}}, Codable { {{#allowableValues}}{{#enumVars}}
         case {{name}} = {{#is ../../this 'container'}}"{{/is}}{{#is ../../this 'string'}}"{{/is}}{{{value}}}{{#is ../../this 'string'}}"{{/is}}{{#is ../../this 'container'}}"{{/is}}{{/enumVars}}{{/allowableValues}}
-    }
+    }