LifterLMS PayPal Version 3.0.0-beta.1

This prerelease version of LifterLMS PayPal will only function in Test Mode with PayPal Sandbox API Credentials.

• PayPal Connect Onboarding is now powered by the lifterlms.com/wp-json/llms-ppc/v1/connect endpoint.
• Fixed an i18n issue encountered due to use of incorrect decimal separators when passing an amount to the PayPal API.
• On checkout, existing checkout errors are cleared when attempting to checkout again.
• On PayPal account disconnect, existing access tokens are dropped from the database.
• Raised the minimum required LifterLMS core version to 7.0.
• Switched from using the WP Core scheduling APIs to the Action Scheduler API for various background tasks and processes.