Patch Flex Nodejs runtime to address critical CVE (#229)

* Updating gts to 0.6.0 to address the critical CVEs

* fixing the incompatible signature errors after the upgrade

builder/steps/gen-dockerfile/contents/package.json

@@ -26,7 +26,7 @@
     "@types/mocha": "^2.2.39",
     "@types/node": "^7.0.5",
     "@types/pify": "0.0.28",
-    "gts": "^0.5.4",
+    "gts": "^0.6.0",
     "js-green-licenses": "^0.2.0",
     "mocha": "^2.5.3",
     "source-map-support": "^0.4.11",

builder/steps/gen-dockerfile/contents/src/detect_setup.ts

@@ -19,7 +19,7 @@
 // since the `shell-escape` module does not have type definitions available.
 const shellEscape: (args: string[]) => string = require('shell-escape');
 
-import * as extend from 'extend';
+import extend from 'extend';
 import * as yaml from 'js-yaml';
 
 import {Locator, Reader} from './fsview';

builder/steps/gen-dockerfile/contents/src/fsview.ts

@@ -16,7 +16,7 @@
 
 import * as fs from 'fs';
 import * as path from 'path';
-import * as pify from 'pify';
+import pify from 'pify';
 
 /**
  * Represents an entity that is capable of reading a filesystem or a

builder/steps/gen-dockerfile/contents/test/detect_setup_test.ts

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-import * as assert from 'assert';
 
+import assert from "assert";
 import {detectSetup, Setup} from '../src/detect_setup';
 
 import {Location, MockLogger, MockView} from './common';

builder/steps/gen-dockerfile/contents/test/generate_files_test.ts

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import * as assert from 'assert';
+import assert from 'assert';
 
 import {Setup} from '../src/detect_setup';
 import {generateFiles} from '../src/generate_files';