Merge for v8.1.1

[raphaelquast]

A quick bugfix release to address issues with colorbars on multiple layers

EOmaps v8.0.1

🔨 Fixes

• ❗ fix colorbars on different layers only show after additional draw
• handle numpy linalg errors resulting from singular colorbar axes

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 57.14286% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 75.29%. Comparing base (e969c4c) to head (034ce66). Report is 1 commits behind head on master.

Files	Patch %	Lines
eomaps/_blit_manager.py	40.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #238 +/- ## ========================================== - Coverage 75.30% 75.29% -0.01% ========================================== Files 26 26 Lines 11754 11754 ========================================== - Hits 8851 8850 -1 - Misses 2903 2904 +1 ```

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