Avoid "Member not found" error in IE (#7411)

Explanation, discussion, and similar change as #7343

Addresses #7320
(cherry picked from commit a8741963dc)

src/renderers/dom/client/syntheticEvents/SyntheticEvent.js

@@ -121,7 +121,7 @@ Object.assign(SyntheticEvent.prototype, {
 
     if (event.preventDefault) {
       event.preventDefault();
-    } else {
+    } else if (typeof event.returnValue !== 'unknown') { // eslint-disable-line valid-typeof
       event.returnValue = false;
     }
     this.isDefaultPrevented = emptyFunction.thatReturnsTrue;