Fix patches dispatched after mutate methods

const myList = new ObservableArray([0,1]);
myList.push("I am going to hide some changes.");
		
canReflect.onPatches(myList, function (patches) {
    console.log(patches[0].insert[0]);   // -> 'Patched after push'
});
	
myList[1] = "Patched after push";

#81