Attempting to implement multiple interfaces on a type causes an error

[arctop-sk]

Describe the bug
A clear and concise description of what the bug is.
Implementing multiple interfaces on a type in a collection is broken, due to wrong delimiter between interfaces.

To Reproduce
Steps to reproduce the behavior:
add 2 interfaces to a collection, build fails

Expected behavior
type is built correctly

Source of the issue is likely here:

export const mainTypeTemplate = ({ typeName, description, interfaces, fields }) =>
${description ? # ${description}: ''} type ${typeName} ${interfaces.length ?implements ${interfaces.join(', ')} : ''}{ ${convertToGraphQL(fields, ' ')} };

${interfaces.join(', ')} should be ${interfaces.join(' & ')}

As multiple interfaces are defined as such:
type Business implements NamedEntity & ValuedEntity {
name: String
value: Int
employeeCount: Int
}

[eric-burel]

Yes you're right, could you please try to open a PR so that I can fix this as soon as possible? It may also happen in Vulcan NPM

[eric-burel]

Note that it seems that comma used to work in earlier version of graphql, but the & is the official syntax now

[arctop-sk]

#2728