fix(require-returns): check labeled statements

Author: brettz9

src/jsdocUtils.js

@@ -524,6 +524,7 @@ const hasReturnValue = (node, promFilter) => {
       return bodyNode.type !== 'FunctionDeclaration' && hasReturnValue(bodyNode, promFilter);
     });
   }
+  case 'LabeledStatement':
   case 'WhileStatement':
   case 'DoWhileStatement':
   case 'ForStatement':

test/rules/assertions/requireReturns.js

@@ -17,6 +17,25 @@ export default {
         },
       ],
     },
+    {
+      code: `
+          /**
+           *
+           */
+          function quux (foo) {
+            someLabel: {
+              return foo;
+            }
+          }
+      `,
+      errors: [
+        {
+          line: 2,
+          message: 'Missing JSDoc @returns declaration.',
+        },
+      ],
+      ignoreReadme: true,
+    },
     {
       code: `
           /**