Added UPGRADE.md

Author: andrey-helldar

UPGRADE.md

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+# Upgrade to 4.0 from 3.12
+
+## High Impact Changes
+
+### PHP 8.2 Required
+
+Laravel Cache now required PHP 8.2.0 or greater.
+
+### Composer Dependencies
+
+You should update the following dependency in your application's composer.json file:
+
+- `dragon-code/laravel-cache` to `^4.0`
+
+### Application Structure
+
+The use of the dependence of the contracts `dragon-code/contracts` was removed.
+
+This means that the `DragonCode\Contracts\*` contracts will no longer be working.
+
+### Replaces Namespaces
+
+- `DragonCode\Contracts\Support\Arrayable` replace with `Illuminate\Contracts\Support\Arrayable`