fix(types): normalized Query can have undefined properties

[andresespinosapc]

When a query param is not present the query value is undefined, but the type is only string | null.

Here is the extract of code where I had this problem:

const route = useRoute();
const sortBy = ref(route.query.sort_by.toString())

I got Cannot read property 'toString' of undefined but the linter didn't give any errors.

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