feat: add shared runtime and codegen support

Runtime/EventBus.cs

@@ -189,7 +189,11 @@ namespace ShrinkEventBus
             }
             catch (Exception exception)
             {
+#if UNITY_5_3_OR_NEWER
                 UnityEngine.Debug.LogException(exception);
+#else
+                System.Diagnostics.Trace.TraceError(exception.ToString());
+#endif
             }
         }
     }