Update boto3 to 1.18.41

[pyup-bot]

This PR updates boto3 from 1.18.40 to 1.18.41.

Changelog

1.18.41

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* api-change:``iot``: [``botocore``] AWS IoT Rules Engine adds OpenSearch action. The OpenSearch rule action lets you stream data from IoT sensors and applications to Amazon OpenSearch Service which is a successor to Amazon Elasticsearch Service.
* api-change:``ec2``: [``botocore``] Adds support for T3 instances on Amazon EC2 Dedicated Hosts.
* enhancement:Tagged Unions: [``botocore``] Introducing support for the `union` trait on structures in request and response objects.

Links

• PyPI: https://pypi.org/project/boto3
• Changelog: https://pyup.io/changelogs/boto3/
• Repo: https://github.com/boto/boto3

[pyup-bot]

Closing this in favor of #348