Pytest-pyvista

What's changed
* New flag to reset image when regression fails added (82)
* Custom error added (80)
* Now Conda installation is supported.
* Several dependencies were upgraded.

Remove's PyVista from the dependencies for improving downstream testing (see 41)

Fix `--reset_image_cache` (PR 39)

What's Changed
* Bump dev version to 0.2 by MatthewFlamm in https://github.com/pyvista/pytest-pyvista/pull/25
* Bump coverage from 7.0.1 to 7.0.3 by dependabot in https://github.com/pyvista/pytest-pyvista/pull/30
* Unpin pyvista by MatthewFlamm in https://github.com/pyvista/pytest-pyvista/pull/31
* Allow saving generated images to dir by MatthewFlamm in https://github.com/pyvista/pytest-pyvista/pull/22
* Update README and docstring with recent changes by MatthewFlamm in https://github.com/pyvista/pytest-pyvista/pull/32
* add in doc build by akaszynski in https://github.com/pyvista/pytest-pyvista/pull/33


**Full Changelog**: https://github.com/pyvista/pytest-pyvista/compare/v0.1.3...v0.1.4