Fix issue IF not working on Minestom (#733)

Author: Leon-JavaScript

inventory-framework-platform-minestom/src/main/kotlin/me/devnatan/inventoryframework/context/RenderContext.kt

@@ -20,7 +20,7 @@ class RenderContext
         id: UUID,
         root: View,
         config: ViewConfig,
-        container: ViewContainer,
+        container: ViewContainer?,
         viewers: Map<String, Viewer>,
         subject: Viewer,
         initialData: Any?,

inventory-framework-platform-minestom/src/main/kotlin/me/devnatan/inventoryframework/internal/MinestomElementFactory.kt

@@ -129,7 +129,7 @@ class MinestomElementFactory : ElementFactory() {
         id: UUID,
         root: RootView,
         config: ViewConfig,
-        container: ViewContainer,
+        container: ViewContainer?,
         viewers: Map<String, Viewer>,
         subject: Viewer,
         initialData: Any?,