Update Stripe library, API version

CRM/Core/Payment/Stripe.php

composer.lock

vendor/composer/installed.json

vendor/stripe/stripe-php/CHANGELOG.md

vendor/stripe/stripe-php/VERSION

vendor/stripe/stripe-php/init.php

vendor/stripe/stripe-php/lib/Account.php

vendor/stripe/stripe-php/lib/AccountLink.php

vendor/stripe/stripe-php/lib/AlipayAccount.php

vendor/stripe/stripe-php/lib/ApiRequestor.php

vendor/stripe/stripe-php/lib/ApiResponse.php

vendor/stripe/stripe-php/lib/ApplePayDomain.php

vendor/stripe/stripe-php/lib/ApplicationFee.php

vendor/stripe/stripe-php/lib/ApplicationFeeRefund.php

vendor/stripe/stripe-php/lib/Balance.php

vendor/stripe/stripe-php/lib/BalanceTransaction.php

vendor/stripe/stripe-php/lib/BankAccount.php

vendor/stripe/stripe-php/lib/BitcoinReceiver.php

vendor/stripe/stripe-php/lib/BitcoinTransaction.php

vendor/stripe/stripe-php/lib/Capability.php