PayPal Express integration is now compatible with 4.1 LTS

BB-17481: PayPal Express Integration 4.1 LTS (#28067)

- moved jsmodules file to a blank theme
- removed old requirejs file
- added changes in composer files
- Moved versioned migration code to the installer.

PayPal Express integration is now compatible with 3.1 LTS

BB-17479: PayPal Express Integration 3.1 LTS

Co-Authored-By: Dmitriev Alexandr <admitriev@oroinc.com>
Co-Authored-By: Ignat Shcheglovskyi <ignat@oroinc.com>
Co-Authored-By: Eugene Chetverikov <ychetverikov@oroinc.com>
Co-Authored-By: vetal-e <vyeromenko@oroinc.com>
Co-Authored-By: Vitaliy Berdylo <vberdylo@oroinc.com>

1.6.2

BB-13880: PayPal Express Integration (1.6) (#17742)

- updated paypal/rest-api-sdk-php (v1.7.1 => 1.13.0)

1.5.2

BB-13880: PayPal Express Integration (1.5) (#17743)

- updated paypal/rest-api-sdk-php (v1.7.1 => 1.13.0)

1.3.2

BB-13880: PayPal Express Integration (1.3)

  - updated paypal/rest-api-sdk-php (v1.7.1 => 1.13.0)