implement currentEvent()

Author: redmitry

src/main/java/org/eclipse/yasson/internal/deserializer/YassonParser.java

@@ -86,6 +86,11 @@ public Event next() {
         return next;
     }
 
+    @Override
+    public Event currentEvent() {
+        return context.getLastValueEvent();
+    }
+    
     @Override
     public String getString() {
         return delegate.getString();

src/main/java/org/eclipse/yasson/internal/jsonstructure/JsonStructureToParserAdapter.java

@@ -78,6 +78,11 @@ public Event next() {
         return next;
     }
 
+    @Override
+    public Event currentEvent() {
+        return iterators.peek().getValueEvent(getValue());
+    }
+    
     @Override
     public String getString() {
         return iterators.peek().getString();