fix(db-manager): improve type definition

[munierujp]

What does this implement/fix? Explain your changes.

[@middy/db-manager] Provide default type definition like @middy/secrets-manager.

Then, default import is available in TypeScript.

import middy from '@middy/core'
import lambda from 'aws-lambda'
import Knex from 'knex'
import dbManager from '@middy/db-manager'

interface Context extends lambda.Context {
  db: Knex
}

const handler = middy(async (
  event: any,
  context: Context,
  callback: lambda.Callback<any>
): Promise<void> => {
  const { db } = context
  const users = await db.select('*').from('users')
  console.log(users)
})

handler.use(dbManager({
  config: {
    client: 'mysql',
    connection: {
      host: '127.0.0.1',
      user: 'your_database_user',
      password: 'your_database_password',
      database: 'myapp_test'
    }
  }
}))

Does this close any currently open issues?

• close @middy/db-manager/index "has no call signatures" #533
• close [@middy/db-manager] Provide default type definition like @middy/secrets-manager #536

Any relevant logs, error output, etc?

none

Any other comments?

none

Where has this been tested?

Node.js Versions: v12.14.0

Middy Versions: 1.0.0

AWS SDK Versions: 2.656.0

Todo list

none