cleanup postmate resources on unrender

Author: douglascayers

force-app/main/aura/LC_API/LC_APIRenderer.js

@@ -0,0 +1,15 @@
+({
+    unrender: function( component, helper ) {
+        this.superUnrender();
+        // When component unrenders then cleanup postmate
+        // resources by destroying the child and nulling out
+        // the helper's cached reference to the child.
+        // This ensures that the helper.handleRestRequest(..) method
+        // waits appropriately for the new parent-child handshake to complete
+        // when this component is re-initialized and scripts are loaded.
+        if ( helper._postmate ) {
+            helper._postmate.destroy();
+            helper._postmate = null;
+        }
+    }
+})