Bump moto from 2.2.7 to 2.2.8

[dependabot]

Bumps moto from 2.2.7 to 2.2.8.

Changelog

Sourced from moto's changelog.

2.2.8

New Services:
    * ACM:
        * export_certificate()
    * APIGateway:
        * create_request_validator()
        * delete_request_validator()
        * get_request_validators()
        * update_request_validator()
Miscellaneous:
* APIGateway: update_rest_api() now has improved support for the patchOperations-parameter
* Batch: register_job_definition() now supports the tags-parameter
* CloudFormation: Stack Events are now propagated to SNS when the NotificationARNs-parameter is supplied.
* EC2: describe_vpc_endpoint_services() now returns the default endpoints for implemented services
* IOT: list_job_executions_for_job() now supports the status-parameter
* IOT: list_job_executions_for_thing() now supports the status-parameter
* KMS: list_resource_tags() now supports an ARN as the KeyId-parameter
* KMS: tag_resource() now supports an ARN as the KeyId-parameter
* KMS: untag_resource() now supports an ARN as the KeyId-parameter
* SecretsManager: update_secret() now supports the ClientRequestToken-parameter

Commits

• 75beb9d Prepare release 2.2.8 (#4345)
• 939b800 Rewrite deprecated EC2 tests (#3881)
• 8e93bfc Fix validation of InputParameters (#4343)
• 8ab76cb Rewrite deprecated ELB tests (#4342)
• c846e92 fix incorrect response tag for DescribeListeners (#2890)
• 3a203d3 Implement EC2 describe_vpc_endpoint_services() (#4322)
• a02bf00 Fix list_job_excecutions_for_thing with status parameter (#4334)
• 579b6e2 SES - SendEmail: source attr can contain chevrons (#4338)
• d87a2ea SQS - Allow XML content to be received as a message attr (#4337)
• dadc529 Update implementation coverage script (#4339)
• Additional commits viewable in compare view

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