Support PHP 8

Support PHP 8 (#17)

Co-authored-by: Ivan Shkuta <ivan.shkuta@onlinesup.com>

v3.0.4

OAuth authorization url switched from HTTP to HTTPS (#16)

v3.0.3

Arr::get() instead of array_get() (#15)

v3.0.2

Fix config for backward compatibility (#11)

v3.0.1

Fix public key retrieving (#10)

v3.0.0

L 5.4 support (#6)

v2.0.1

Update README.md

v2.0.0

Upgrade PHP and Manager versions

v1.1.0

Update socialiteproviders/manager version

v1.0.0

First release