feat: Added support for lambda_authorization_config

[michaelhelmick]

Description

Add lambda_authorization_config variable and dynamic argument to module.

Motivation and Context

AWS Lambda authorization was added in 3.70.0 https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/appsync_graphql_api#aws-lambda-authorizer-authentication

Fixes #19

Breaking Changes

No breaking changes.

How Has This Been Tested?

• I have tested and validated these changes using one or more of the provided examples/* projects
  I haven't had a chance to test these, personally. If I get the chance before somebody else does, I will update this section.

Was able to confirm this working with a test environment:

...

module "appsync_test" {
  source = "git::https://github.com/michaelhelmick/terraform-aws-appsync.git?ref=fc3f1c257b588ff457aaa3b5a716010010ac2d06"
  schema                     = data.template_file.schema.rendered
  name                         = "appsync-test"
  authentication_type = "AWS_LAMBDA"
  lambda_authorizer_config = {
    authorizer_uri = module.authorization_lambda.arn
  }
  ...
}

Authorized and got a successful response.

[antonbabenko]

Please update the code in examples to show this feature in action. Also, versions.tf should say 3.70.0 as a minimum because this is when this feature was added to the provider.

[michaelhelmick]

@antonbabenko updated! Example, I only added the required argument

[antonbabenko]

This PR is included in version 1.2.0 🎉

[github-actions]

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