security: NPM audit fails due to outdated dependency

[mobidev111]

Current Behavior

currently used version of dependency tsdx fails the npm security audit:

 "tsdx": "^0.12.3",

https://github.com/sw-yx/react-netlify-identity/blob/master/package.json#L56

│ moderate │ Cross-Site Scripting │
│ Package │ serialize-javascript │
│ Patched in │ >=2.1.1

Expected behavior

no npm audit failure

Suggested solution(s)

upgrade to latest version of tsdx

Additional context

This prevents this library to be used in any security aware projects

[mobidev111]

Same for "yargs-parser"