This makes possible to only specify a subset of options.
As an example, imagine we want to pass a customized `updateCheck` function to `getDefaultMutations`. Before this commit options weren't merged, so all of them had to be specified:
```
getDefaultMutations({
typeName,
collectionName,
options: {
create: true,
update: true,
upsert: true,
delete: true,
updateCheck: () => true,
});
```
After the commit:
```
getDefaultMutations({
typeName,
collectionName,
options: {
updateCheck: () => true,
});
```
Hi, using when using the default mutations, you can't allow a guest user to create a document, even if you allowed it for `guests` when setting up permissions. This is because a undefined `user` will always trigger a `false` during the "new" check.
I think it is safe to remove this, because anyway you have to manually tell who can create document (or so I think, maybe I'm wrong?) so you can't allow guests to create documents by mistake.
