feat: Use std::shared_ptr<Promise<T>> instead of std::future<T> f…

…or callbacks that return a value (#412)

* feat: Use `std::shared_ptr<Promise<T>>` instead of `std::future<T>` for callbacks that return a value

* Update FunctionType.ts

* chore: Lint

* Update Dispatcher.hpp

* chore: Update Podfile.lock

docs/docs/types/types.md

@@ -109,9 +109,9 @@ These are all the types Nitro supports out of the box:
   </tr>
   <tr>
     <td><code>(T...) =&gt; R</code></td>
-    <td><code>std::function&lt;std::future&lt;R&gt; (T...)&gt;</code></td>
-    <td>❌</td>
-    <td>❌</td>
+    <td><code>std::function&lt;std::shared_ptr&lt;Promise&lt;R&gt;&gt; (T...)&gt;</code></td>
+    <td><code>(T...) -&gt; <a href="./ios/core/Promise.swift">Promise&lt;T&gt;</a></code></td>
+    <td><code>(T...) -&gt; <a href="./android/src/main/java/com/margelo/nitro/core/Promise.kt">Promise&lt;T&gt;</a></code></td>
   </tr>
   <tr>
     <td><code>Record&lt;string, T&gt;</code></td>