fix(no-undefined-types): do not crash on variadic arguments

When running `no-undefined-types` on our codebase, I discovered that it
crashes on `variadic` arguments. It turns out that jsdoctypeparser does
not cleanly traverse over variadic arguments. Thus, used the
`parsedType` to traverse over instead.

Author: TimvdLippe

README.md

@@ -4117,6 +4117,13 @@ class Foo {
   }
 }
 // Message: The type 'TEMPLATE_TYPE_A' is undefined.
+
+/**
+ * @param {...VAR_TYPE} varargs
+ */
+function quux (varargs) {
+}
+// Message: The type 'VAR_TYPE' is undefined.
 ````
 
 The following patterns are not considered problems:
@@ -4323,6 +4330,18 @@ function registerEvent(obj, method, callback) {
 
 }
 // Settings: {"jsdoc":{"mode":"typescript"}}
+
+ /**
+ * @param {...} varargs
+ */
+function quux (varargs) {
+}
+
+/**
+ * @param {...number} varargs
+ */
+function quux (varargs) {
+}
 ````
 
 

test/rules/assertions/noUndefinedTypes.js

@@ -261,6 +261,21 @@ export default {
         },
       ],
     },
+    {
+      code: `
+      /**
+       * @param {...VAR_TYPE} varargs
+       */
+      function quux (varargs) {
+      }
+      `,
+      errors: [
+        {
+          line: 3,
+          message: 'The type \'VAR_TYPE\' is undefined.',
+        },
+      ],
+    },
   ],
   valid: [
     {
@@ -583,5 +598,23 @@ export default {
         },
       },
     },
+    {
+      code: `
+      /**
+      * @param {...} varargs
+      */
+     function quux (varargs) {
+     }
+     `,
+    },
+    {
+      code: `
+     /**
+      * @param {...number} varargs
+      */
+     function quux (varargs) {
+     }
+     `,
+    },
   ],
 };