fix(graphql-server): enhance type safety of RootResolvers and Options

[koralle]

related #198 (I'm not familiar with Pothos, so I'm not sure...)

Summary

This commit introduces more specific type annotations to the following modules:

• RootResolvers
• Options

Specifically, the same type parameters used in the definition of Context class were given to them:

<E extends Env = any, P extends string = any, I extends Input = {}>

See: https://github.com/honojs/hono/blob/main/src/context.ts

Diff

To confirm, change bun_test/index.test.ts as follows (not included in the commit)

describe('graphql-server', () => {
  // Construct a schema, using GraphQL schema language
  const schema = buildSchema(`
  type Query {
    hello: String
  }
`)

  // My motivation is to development a GraphQL server on Cloudflare Workers with D1.
  type Bindings = {
    DB: string
  }
  
  type GraphQLContext = Context<{ Bindings: Bindings }, '/graphql'>

  // The root provides a resolver function for each API endpoint
  const rootValue = (ctx?: GraphQLContext) => {
    return {
      hello: () => {
        return 'Hello world!'
      },
    }
  }

  const app = new Hono()

  app.use(
    '/graphql',
    graphqlServer({
      schema,
      rootResolver: rootValue,
    })
  )

  // ...


})

Before

After

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🦋 Changeset detected

Latest commit: 490ad75

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@hono/graphql-server	Patch

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[yusukebe]

@koralle

Thank you for the PR. Looks good! Ship it now.