Update boto3 to 1.16.8

[pyup-bot]

This PR updates boto3 from 1.16.7 to 1.16.8.

Changelog

1.16.8

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* api-change:``elbv2``: [``botocore``] Update elbv2 client to latest version
* api-change:``codeartifact``: [``botocore``] Update codeartifact client to latest version
* api-change:``marketplacecommerceanalytics``: [``botocore``] Update marketplacecommerceanalytics client to latest version
* api-change:``apigateway``: [``botocore``] Update apigateway client to latest version
* api-change:``sesv2``: [``botocore``] Update sesv2 client to latest version
* api-change:``ec2``: [``botocore``] Update ec2 client to latest version
* api-change:``storagegateway``: [``botocore``] Update storagegateway client to latest version

Links

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

[coveralls]

Pull Request Test Coverage Report for Build 1591

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 68.146%

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Totals
Change from base Build 1588:	0.0%
Covered Lines:	599
Relevant Lines:	879

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💛 - Coveralls

[pyup-bot]

Closing this in favor of #406