WithRequired type

This package defines the TypeScript utility type WithRequired. It transforms a type that has one or more optional fields into a type where those fields are required.

For example:

``
import { WithRequired } from '@apollo/utils.withrequired';

interface HasSomeOptionals {
foo: number;
bar?: string;
baz?: boolean;
quux?: string;
}

type MoreRequired = WithRequired;
`

The MoreRequired type is like HasSomeOptionals, but bar and baz are now required rather than optional. quux` remains optional.