feat(GlobalErrors): Route unhandledrejections to onerror

Fixes #1777

src/core/GlobalErrors.js

@@ -63,8 +63,25 @@ getJasmineRequireObj().GlobalErrors = function(j$) {
         var originalHandler = global.onerror;
         global.onerror = onerror;
 
+        var browserRejectionHandler = function browserRejectionHandler(event) {
+          onerror('Unhandled Rejection: ' + event.reason);
+        };
+
+        if (global.addEventListener) {
+          global.addEventListener(
+            'unhandledrejection',
+            browserRejectionHandler
+          );
+        }
+
         this.uninstall = function uninstall() {
           global.onerror = originalHandler;
+          if (global.removeEventListener) {
+            global.removeEventListener(
+              'unhandledrejection',
+              browserRejectionHandler
+            );
+          }
         };
       }
     };