Add support for Inertia optional props (#33)

Author: hailwood

src/DataProvider.php

@@ -10,6 +10,7 @@
 use Illuminate\Contracts\Support\Jsonable;
 use Inertia\DeferProp;
 use Inertia\LazyProp;
+use Inertia\OptionalProp;
 use Inertia\Response;
 use ReflectionClass;
 use ReflectionMethod;
@@ -42,7 +43,7 @@ public function toArray(): array
             ->filter(fn (ReflectionMethod $method) => ! $method->isStatic() && ! in_array($method->name, $this->excludedMethods))
             ->mapWithKeys(function (ReflectionMethod $method) {
                 $returnType = $method->getReturnType();
-                if ($returnType instanceof ReflectionNamedType && in_array($returnType->getName(), [DeferProp::class, LazyProp::class, Closure::class])) {
+                if ($returnType instanceof ReflectionNamedType && in_array($returnType->getName(), [DeferProp::class, LazyProp::class, OptionalProp::class, Closure::class])) {
                     return [$method->name => $method->invoke($this)];
                 }