Mdolab-baseclasses

New Features
* Redirect IO function from [multipoint](https://github.com/mdolab/multipoint) has been moved to `baseclasses.utils.redirectIO` and now supports separate stdout/stderr files by akleb in https://github.com/mdolab/baseclasses/pull/69
* New redirectIO function `redirectingIO` that works with python context manager to redirect output streams within a python `with` block.

Maintenance
* kwargs for AeroSolver addPointSet by sseraj in https://github.com/mdolab/baseclasses/pull/73

**Full Changelog**: https://github.com/mdolab/baseclasses/compare/v1.5.4...v1.6.0

New features
* Added some utility functions by nwu63 in https://github.com/mdolab/baseclasses/pull/70
* added optional flush option to custom pp function by marcomangano in https://github.com/mdolab/baseclasses/pull/71
* Refactoring pp in BaseSolver to use an updating pp in utils. by eirikurj in https://github.com/mdolab/baseclasses/pull/72

Maintenance
* Remove **kwargs from StructProblem by A-CGray in https://github.com/mdolab/baseclasses/pull/67

**Full Changelog**: https://github.com/mdolab/baseclasses/compare/v1.5.3...v1.5.4

New features
None

Bug fixes
- Fix JSON serialization of CaseInsensitive containers (63)
- Fixed module name being None when not found (59)

Documentation
- Add Documentation for Regression Testing (61)

Maintenance
- Add coverage (62)
- Refactor the repo (64)
- Update flake8 and docs (65)

Features
- Added `require_mpi` decorator for testing (52)
Bug fixes
- Updated containers to use ABC (51)
- Fix pprint for custom containers (54)
Maintenance
- Edited AeroProblem docstrings (55)

This patch release contains the following:
- Updated optional dependencies to no longer print annoying warning messages (49)
- Update test script (47) and various maintenance tasks

This is a minor release of baseclasses.
New features
- Added the BC variable `Heat` in preparation for the actuator zone modifications in ADflow (44)
Bugfixes
- Disallow non-string indexing in reference dictionary (45)
- Changed `BaseSolver.pp` to use `pprint` only if `obj` is not string (43)
Maintenance
- Added Azure Pipelines (46)