Upgrade to Laravel 9 (#4413)

Co-authored-by: DaneEveritt <dane@daneeveritt.com>

app/Http/Requests/Api/Remote/ActivityEventRequest.php

@@ -27,9 +27,7 @@ class ActivityEventRequest extends FormRequest
     }
 
     /**
-     * Returns all of the unique server UUIDs that were recieved in this request.
-     *
-     * @return string[]
+     * Returns all the unique server UUIDs that were received in this request.
      */
     public function servers(): array
     {
@@ -37,9 +35,7 @@ class ActivityEventRequest extends FormRequest
     }
 
     /**
-     * Returns all of the unique user UUIDs that were submitted in this request.
-     *
-     * @return string[]
+     * Returns all the unique user UUIDs that were submitted in this request.
      */
     public function users(): array
     {

app/Http/Requests/Api/Remote/AuthenticateWebsocketDetailsRequest.php

@@ -6,18 +6,12 @@ use Illuminate\Foundation\Http\FormRequest;
 
 class AuthenticateWebsocketDetailsRequest extends FormRequest
 {
-    /**
-     * @return bool
-     */
-    public function authorize()
+    public function authorize(): bool
     {
         return true;
     }
 
-    /**
-     * @return array
-     */
-    public function rules()
+    public function rules(): array
     {
         return [
             'server_uuid' => 'required|string',

app/Http/Requests/Api/Remote/InstallationDataRequest.php

@@ -6,18 +6,12 @@ use Illuminate\Foundation\Http\FormRequest;
 
 class InstallationDataRequest extends FormRequest
 {
-    /**
-     * @return bool
-     */
-    public function authorize()
+    public function authorize(): bool
     {
         return true;
     }
 
-    /**
-     * @return array
-     */
-    public function rules()
+    public function rules(): array
     {
         return [
             'successful' => 'present|boolean',

app/Http/Requests/Api/Remote/ReportBackupCompleteRequest.php

@@ -6,10 +6,7 @@ use Illuminate\Foundation\Http\FormRequest;
 
 class ReportBackupCompleteRequest extends FormRequest
 {
-    /**
-     * @return string[]
-     */
-    public function rules()
+    public function rules(): array
     {
         return [
             'successful' => 'required|boolean',

app/Http/Requests/Api/Remote/SftpAuthenticationFormRequest.php

@@ -8,20 +8,16 @@ class SftpAuthenticationFormRequest extends FormRequest
 {
     /**
      * Authenticate the request.
-     *
-     * @return bool
      */
-    public function authorize()
+    public function authorize(): bool
     {
         return true;
     }
 
     /**
      * Rules to apply to the request.
-     *
-     * @return array
      */
-    public function rules()
+    public function rules(): array
     {
         return [
             'type' => ['nullable', 'in:password,public_key'],
@@ -33,10 +29,8 @@ class SftpAuthenticationFormRequest extends FormRequest
     /**
      * Return only the fields that we are interested in from the request.
      * This will include empty fields as a null value.
-     *
-     * @return array
      */
-    public function normalize()
+    public function normalize(): array
     {
         return $this->only(
             array_keys($this->rules())