Restart language service on file change

[pmelab]

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Is your feature request related to a problem? Please describe.

When working with GraphQL schema files, updates to the schema are not reflected until LspRestart is called., because graphql-language-service-cli apparently does not pick up file changes on the fly, like oder language services do.

Describe the solution you'd like

On saving files with a certain pattern, restart a given language service.

Describe potential alternatives you've considered

No response

Additional context

No response

[pmelab]

Never mind, apparently the GraphQL language server should be able to do that as soon as this PR is in: graphql/graphiql#3301