Fixed missing fetch definition in TS default tests

samples/client/petstore/typescript/tests/default/package-lock.json

@@ -831,9 +831,9 @@
       "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls="
     },
     "js-yaml": {
-      "version": "3.12.0",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.12.0.tgz",
-      "integrity": "sha512-PIt2cnwmPfL4hKNwqeiuz4bKfnzHTBv6HyVgjahA6mPLwPDzjDWrplJBMjHUFxku/N3FlmrbyPclad+I+4mJ3A==",
+      "version": "3.13.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
+      "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
       "requires": {
         "argparse": "^1.0.7",
         "esprima": "^4.0.0"

samples/client/petstore/typescript/tests/default/tsconfig.json

@@ -10,7 +10,8 @@
             "node"
         ],
         "lib": [
-            "es6"
+            "es6",
+            "dom"
         ]
     },
     "exclude": [