chore(deps): bump s3transfer from 0.3.4 to 0.3.6

Bumps [s3transfer](https://github.com/boto/s3transfer) from 0.3.4 to 0.3.6.
- [Release notes](https://github.com/boto/s3transfer/releases)
- [Changelog](https://github.com/boto/s3transfer/blob/develop/CHANGELOG.rst)
- [Commits](boto/s3transfer@0.3.4...0.3.6)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.txt

@@ -36,7 +36,7 @@ ruamel.yaml.clib==0.2.2
     # via ruamel.yaml
 ruamel.yaml==0.16.13
     # via drode (setup.py)
-s3transfer==0.3.4
+s3transfer==0.3.6
     # via boto3
 six==1.15.0
     # via python-dateutil