Fix. invoke async with register refs

Author: sleipnir

README.md

@@ -94,7 +94,7 @@ The second thing we have to do is add the spawn dependency to the project.
 <dependency>
    <groupId>com.github.eigr</groupId>
    <artifactId>spawn-java-std-sdk</artifactId>
-   <version>v1.2.0</version>
+   <version>v1.2.1</version>
 </dependency>
 ```
 We're also going to configure a few things for our application build to work, including compiling the protobuf files. 
@@ -128,7 +128,7 @@ See below a full example of the pom.xml file:
       <dependency>
          <groupId>com.github.eigr</groupId>
          <artifactId>spawn-java-std-sdk</artifactId>
-         <version>v1.2.0</version>
+         <version>v1.2.1</version>
       </dependency>
       <dependency>
          <groupId>ch.qos.logback</groupId>

pom.xml

@@ -4,7 +4,7 @@
     <groupId>io.eigr.spawn</groupId>
     <artifactId>spawn-java-std-sdk</artifactId>
     <packaging>jar</packaging>
-    <version>1.2.0</version>
+    <version>1.2.1</version>
     <name>spawn-java-std-sdk</name>
     <url>http://maven.apache.org</url>
 

src/main/java/io/eigr/spawn/api/ActorRef.java

@@ -324,6 +324,10 @@ private <T extends GeneratedMessageV3, S extends GeneratedMessageV3> void invoke
 
         Protocol.InvocationRequest.Builder invocationRequestBuilder = Protocol.InvocationRequest.newBuilder();
 
+        if (Objects.nonNull(this.actorId.getParent()) && !this.actorId.getParent().isEmpty()) {
+            invocationRequestBuilder.setRegisterRef(this.actorId.getParent());
+        }
+
         Map<String, String> metadata = new HashMap<>();
         options.ifPresent(opts -> {
             invocationRequestBuilder.setAsync(true);

src/test/java/io/eigr/spawn/test/actors/JoeActor.java

@@ -4,6 +4,7 @@
 import io.eigr.spawn.api.actors.ActorContext;
 import io.eigr.spawn.api.actors.annotations.Action;
 import io.eigr.spawn.api.actors.annotations.stateful.StatefulNamedActor;
+import io.eigr.spawn.api.actors.workflows.SideEffect;
 import io.eigr.spawn.java.test.domain.Actor;
 
 @StatefulNamedActor(name = "test_joe", stateType = Actor.State.class, channel = "test.channel")