Update botocore requirement from <1.42.0,>=1.15.0 to >=1.15.0,<1.43.0

Updates the requirements on [botocore](https://github.com/boto/botocore) to permit the latest version.
- [Commits](boto/botocore@1.15.0...1.42.1)

---
updated-dependencies:
- dependency-name: botocore
  dependency-version: 1.42.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -85,7 +85,7 @@ gunicorn==23.0.0
 s3transfer==0.16.0
 jmespath==1.0.1
 
-botocore>=1.15.0,<1.42.0
+botocore>=1.15.0,<1.43.0
 boto3>=1.12.0,<1.43.0
 
 python-dateutil==2.9.0.post0