* Fix for IE11 and older browsers

Remove idempotency key from paymentsDetails calls

* [PW-1737] Add idempotency key

* Add constraint to only work with php library version 4.1 and higher (4.1 we will release today)

remove unused method called continueToAdyen and fix javascript error …

remove unused method called continueToAdyen and fix javascript error if window.ApplePaySession does not exists important fix as this will result in javascript errors on non safari browsers

Remove extra greater character

Fix cartebancaire_small.png non existent

Fix validation script

use Magento\Framework\Serialize\Serializer\Serialize, fix typo on setAdditionalData, add !empty checks for serialization, change algorithm from md5 to sha256, send deviceFingerprint for Ratepay

* Fix Adyen\DataTest

This one is a bit more complex. DataTest depends on some external classes from Magento, so I set up a config and a bootstrap files for testing. While I was at this, I also made the dependencies a bit more strict.

* Update php requirement to match with Magento 2.2.8

To help merchants implements a Progressive Web App shop, this change will expose the origin key so that it's easier to configure the payment module.

This reverts commit d5f65e9e.

To help merchants implements a Progressive Web App shop, this change will expose the origin key so that it's easier to configure the payment module.

* Update applepay version

* Working on applepay check

* Add check for applePay version

PW-1634 Retrieve shopper email during guest checkout wth virtual product

available

[PW-1628] Use getXForwardedFor instead of getRemoteIp to retrieve the…

[PW-1628] Use getXForwardedFor instead of getRemoteIp to retrieve the shopperIp rather then server IP

Expose last 4 digits of API keys

To help debug issues, expose the last 4 digits of API keys.