Type annotations for boto3 EMR

mypy-boto3-emr provides high-quality type annotations for the AWS boto3 EMR (Elastic MapReduce) service. It allows developers to leverage static type checking with tools like MyPy, improving code reliability and developer experience when working with boto3. The library is currently at version 1.42.77 and is part of the `youtype/mypy_boto3_builder` project, which generates new stub packages frequently, typically aligning with boto3/botocore releases.