[Feature] PayPalButtonsComponent ts support

[Mingo-233]

🚀 Feature Proposal

I have found that the latest package version for PayPal.js is 6.0.1, where PayPalButtonsComponent has only three methods in its ts type. However, when I printed this object in the JS console, I found that it has many methods, but it was not found in the ts file. Are these methods unusable or were the ts type omitted and added?

Motivation

Improve development efficiency

Example