iOS 4.1.0

API updates:

• Added new method checkTrialOrIntroDiscountEligibility(product:), which allows you to check for intro or discount eligibility for a single StoreProduct.
  https://github.com/RevenueCat/purchases-ios/pull/1354

• Added explicit parameter name for checkTrialOrIntroDiscountEligibility(productIdentifiers:).
  The existing method without the parameter name still work, but is now deprecated. Xcode will offer an auto fix-it for it.
  https://github.com/RevenueCat/purchases-ios/pull/1362

• Made StoreProduct initializers public so they can be used for testing.

Other:

• Added auto-fix-it for invalidatePurchaserInfoCache rename
  https://github.com/RevenueCat/purchases-ios/pull/1379

• Docs improvements

• A lot of under-the-hood improvements, mainly focusing on network requests and tests.

To view new release, visit https://github.com/RevenueCat/purchases-ios/releases/tag/4.1.0