🔧 Acorn v3 (Laravel 9.x), drop PHP 7.4 support (#3097)

Co-authored-by: retlehs <retlehs@users.noreply.github.com>
Co-authored-by: Brandon Nifong <brandon@tendency.me>

app/Providers/ThemeServiceProvider.php

@@ -2,9 +2,9 @@
 
 namespace App\Providers;
 
-use Roots\Acorn\ServiceProvider;
+use Roots\Acorn\Sage\SageServiceProvider;
 
-class ThemeServiceProvider extends ServiceProvider
+class ThemeServiceProvider extends SageServiceProvider
 {
     /**
      * Register any application services.
@@ -13,7 +13,7 @@ class ThemeServiceProvider extends ServiceProvider
      */
     public function register()
     {
-        //
+        parent::register();
     }
 
     /**
@@ -23,6 +23,6 @@ class ThemeServiceProvider extends ServiceProvider
      */
     public function boot()
     {
-        //
+        parent::boot();
     }
 }