Fix node-fetch, node-forge sec vulns (#1530)

Summary:
You know the drill.

Pull Request resolved: https://github.com/facebook/flipper/pull/1530

Test Plan: Checked that `yarn.lock` references the respective new versions.

Reviewed By: nikoant

Differential Revision: D23733338

Pulled By: passy

fbshipit-source-id: abf9812b977542a8b297b88ea16c7c01a062898b

react-native/ReactNativeFlipperExample/package.json

@@ -30,6 +30,7 @@
     "react-native-flipper": "../react-native-flipper"
   },
   "resolutions": {
-    "minimist": "1.2.3"
+    "minimist": "1.2.3",
+    "node-fetch": "^2.6.1"
   }
 }