Update cloudpathlib to 0.19.0

[pyup-bot]

This PR updates cloudpathlib from 0.16.0 to 0.19.0.

Changelog

0.18.0

- Implement sliced downloads in GSClient. (Issue [387](https://github.com/drivendataorg/cloudpathlib/issues/387), PR [#389](https://github.com/drivendataorg/cloudpathlib/pull/389))
- Implement `as_url` with presigned parameter for all backends. (Issue [235](https://github.com/drivendataorg/cloudpathlib/issues/235), PR [#236](https://github.com/drivendataorg/cloudpathlib/pull/236))
- Stream to and from Azure Blob Storage. (PR [403](https://github.com/drivendataorg/cloudpathlib/pull/403))
- Implement `file:` URI scheme support for `AnyPath`. (Issue [401](https://github.com/drivendataorg/cloudpathlib/issues/401), PR [#404](https://github.com/drivendataorg/cloudpathlib/pull/404))

**Note: This is the last planned Python 3.7 compatible release version.**

0.17.0

- Fix `S3Client` cleanup via `Client.__del__` when `S3Client` encounters an exception during initialization. (Issue [372](https://github.com/drivendataorg/cloudpathlib/issues/372), PR [#373](https://github.com/drivendataorg/cloudpathlib/pull/373), thanks to [bryanwweber](https://github.com/bryanwweber))
- Skip mtime checks during upload when force_overwrite_to_cloud is set to improve upload performance. (Issue [379](https://github.com/drivendataorg/cloudpathlib/issues/379), PR [#380](https://github.com/drivendataorg/cloudpathlib/pull/380), thanks to [Gilthans](https://github.com/Gilthans))

Links

• PyPI: https://pypi.org/project/cloudpathlib
• Changelog: https://data.safetycli.com/changelogs/cloudpathlib/