StarPrnt should, but does not, accept null for some methods

[JCTInfinity]

I'm submitting a ... (check one with "x")
[x] bug report
[ ] feature request
[ ] support request => Please do not submit support requests here, use one of these channels: https://forum.ionicframework.com/ or https://ionicworldwide.herokuapp.com/

Current behavior:
StarPrnt print methods and openCashDrawer have port argument typed to string. Attempting to pass a potentially null value throws a compile error in TypeScript environments.

Expected behavior:
These methods should (as noted in their comments) accept null values, which means: use the connected printer

Steps to reproduce:
Set up a typescript application and pass null or a null|string type variable for the port to openCashDrawer and/or any of the print methods. Compile the application and see a type error for the method about expecting a string.

Related code:
See related PR: #4095

Other information:
I've confirmed the change in the PR resolves the issue and correctly uses the connected printer when given a null port. Thanks for your attention and maintenance of this project.

Ionic info: (run ionic info from a terminal/cmd prompt and paste output below):

Ionic:

   Ionic CLI       : 6.18.1 (/Users/jchristyler/.nvm/versions/node/v16.13.2/lib/node_modules/@ionic/cli)
   Ionic Framework : @ionic/vue 6.0.2

Capacitor:

   Capacitor CLI      : 3.3.4
   @capacitor/android : 3.3.4
   @capacitor/core    : 3.3.4
   @capacitor/ios     : 3.3.4

Utility:

   cordova-res : not installed globally
   native-run  : 1.5.0

System:

   NodeJS : v16.13.2 (/Users/jchristyler/.nvm/versions/node/v16.13.2/bin/node)
   npm    : 8.1.2
   OS     : macOS Monterey


  ─────────────────────────────────────────────────

     Ionic CLI update available: 6.18.1 → 6.19.0
          Run npm i -g @ionic/cli to update

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[JCTInfinity]

Fix is merged and updated with 5.41.0 (at least). Thank you!