feat: Choose 'png' image compression in BqplotImageView by default (#… #460

Job	Run time
initial_checks / Load tox environments	7s
initial_checks / codestyle (ubuntu-latest)	15s
no_coverage / Load tox environments	7s
tests / Load tox environments	6s
tests / py38-test (ubuntu-latest)	2m 11s
tests / py39-test (ubuntu-latest)	1m 56s
tests / py310-test (ubuntu-latest)	2m 11s
tests / py311-test (ubuntu-latest)	1m 58s
tests / py38-test (macos-12)	2m 33s
tests / py39-test (macos-12)	3m 28s
tests / py311-test (macos-latest)	2m 8s
tests / py38-test (windows-latest)	3m 52s
tests / py39-test (windows-latest)	2m 55s
tests / py310-test (windows-latest)	3m 10s
no_coverage / py39-notebooks (windows-latest)	2m 51s
no_coverage / py38-notebooks (macos-12)	2m 10s
no_coverage / py310-notebooks (ubuntu-latest)	1m 32s
no_coverage / py311-docs (ubuntu-latest)	1m 20s
no_coverage / py39-docs (macos-12)	4m 1s
no_coverage / py38-docs (windows-latest)	4m 12s
publish / Build source and wheel distribution	3m 43s
	46m 46s

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