Dlhub-sdk

Overview
Updated the DLHub SDK to be compatible with Globus Compute, fka funcX. DLHub SDK <= 2.0.x will still be compatible with funcX>=1.0.11,<2.0.0. No breaking changes were made in this release.

What's Changed
* 186 update dlhub sdk for globus compute by ericblau in https://github.com/DLHub-Argonne/dlhub_sdk/pull/189


**Full Changelog**: https://github.com/DLHub-Argonne/dlhub_sdk/compare/v2.0.3...v2.1.0

Patch to fix a bug where a user-specified requirements.txt file was not being recognized by the SDK

What's Changed
* Respect requirements.txt for container builds if it is provided by ericblau in https://github.com/DLHub-Argonne/dlhub_sdk/pull/191


**Full Changelog**: https://github.com/DLHub-Argonne/dlhub_sdk/compare/v2.0.2...v2.0.3

Add upper bound on funcx requirements to avoid globus-compute incompatibility errors

In v2.0.0 the required `funcx` package was left at `>=1.0.0`, however container service support was not added until around v1.0.10. This resulted in the package being unusable, as import errors would kill any invocation of `dlhub_sdk`.

This patch updates the proper `funcx` package to be `>=1.0.11`

- New container-service is integrated, bringing improvements in efficiency, reliability, and debugging capabilities. Users can now get informative error messages
- Minor bugfixes
- Improved testing

What's Changed
* Lazily import classes as needed by WardLT in https://github.com/DLHub-Argonne/dlhub_sdk/pull/175


**Full Changelog**: https://github.com/DLHub-Argonne/dlhub_sdk/compare/v1.1.0...v1.1.1