[DO NOT MERGE] Increase minimum label height to 20px

[avocadomayo]

Description

Co-authored by @gcaven

Hello PayPal SDK team 👋 We are trying to render a PayPal button using the disableMaxHeight: true and disableMaxWidth: true params so the PayPal button sizes according to the container.

We noticed the PayPal logo scales proportionately to the container size, but at small container sizes, the PayPal logo gets very small such that it looks inconsistent to other branded buttons on the page- please see screenshots below.

@westeezy helped us and pointed us out to where the .paypal-button-label-container CSS is generated. However, labelHeight is dynamic and used in a lot of places, so we were curious if you could help us make sense of whether this fits in your product requirements and move this forward. Many thanks in advance 🙏

Reproduction Steps (if applicable)

1. In the style param, set disableMaxHeight: true and disableMaxWidth: true
2. Render the PayPal button in a small container, eg. 100px width x 42px height

Screenshots (if applicable)

Current state

Desired state

Why are we making these changes? Include references to any related Jira tasks or GitHub Issues

Dependent Changes (if applicable)

Groups who should review (if applicable)

❤️ Thank you!