Assert createDatabase() success

Pretty much all errors that can happen in createDatabase() end up
throwing an exception, however the function still does return a boolean
(it bubbles up the value from the underlying $conn->statement() call)
which should be checked in at least some way.

Author: stancl

src/Jobs/CreateDatabase.php

@@ -40,7 +40,7 @@ public function handle(DatabaseManager $databaseManager): bool
 
         try {
             $databaseManager->ensureTenantCanBeCreated($this->tenant);
-            $this->tenant->database()->manager()->createDatabase($this->tenant);
+            assert($this->tenant->database()->manager()->createDatabase($this->tenant) === true);
 
             event(new DatabaseCreated($this->tenant));
         } catch (TenantDatabaseAlreadyExistsException | TenantDatabaseUserAlreadyExistsException $e) {