use union types for sortBy method; removed PHP 7.4 support

Author: mechelon

composer.json

@@ -25,7 +25,7 @@
         }
     ],
     "require": {
-        "php": "^7.4|^8.0",
+        "php": "^8.0",
         "guzzlehttp/guzzle": "^7.0.1",
         "illuminate/support": "^8.0|^9.0"
     },

src/Endpoints/Database.php

@@ -102,17 +102,19 @@ public function filterBy(Collection $filter): Database
      *
      * @throws HandlingException
      *
-     * @todo As soon as this package drops PHP 7.4 support, we can use union types here (Sorting and Collection)
      */
-    public function sortBy($sorts): Database
+    public function sortBy(Sorting|Collection $sorts): Database
     {
-        if($sorts instanceof Sorting) {
-            $this->sorts->push($sorts);
-        } elseif($sorts instanceof Collection) {
-            $this->sorts = $sorts;
-        }
-        else {
-            throw new HandlingException("The parameter 'sorts' must be either a instance of the class Sorting or a Collection of Sortings.");
+        $sortInstance = get_class($sorts);
+        switch($sortInstance) {
+            case Sorting::class:
+                $this->sorts->push($sorts);
+                break;
+            case Collection::class:
+                $this->sorts = $sorts;
+                break;
+            default:
+                throw new HandlingException("The parameter 'sorts' must be either a instance of the class Sorting or a Collection of Sortings.");
         }
 
         return $this;

src/Notion.php

@@ -227,7 +227,7 @@ private function buildRequestHeader(): array
     }
 
     /**
-     * Due to the inconsistency of the Notion API requiring a endpoint url
+     * Due to the inconsistency of the Notion API requiring an endpoint url
      * with v* as well as a dated version in the request header, this method
      * maps the given version (e.g. v1) to the version date Notion requires
      * in the header (e.g. "2021-05-13").
@@ -240,7 +240,7 @@ private function mapVersionToHeaderVersion(): string
     {
         switch ($this->version) {
             case 'v1':
-                return '2022-06-28';
+                return '2021-05-13';
             default:
                 throw new HandlingException('Invalid version.');
         }