feat: Choose 'png' image compression in BqplotImageView by default (#… #459

Job	Run time
initial_checks / Load tox environments	7s
initial_checks / codestyle (ubuntu-latest)	17s
tests / Load tox environments	7s
no_coverage / Load tox environments	6s
no_coverage / py39-notebooks (windows-latest)	2m 46s
no_coverage / py38-notebooks (macos-12)	2m 6s
no_coverage / py310-notebooks (ubuntu-latest)	1m 37s
no_coverage / py311-docs (ubuntu-latest)	1m 31s
no_coverage / py39-docs (macos-12)	3m 53s
no_coverage / py38-docs (windows-latest)	3m 42s
tests / py38-test (ubuntu-latest)	2m 30s
tests / py39-test (ubuntu-latest)	1m 53s
tests / py310-test (ubuntu-latest)	2m 27s
tests / py311-test (ubuntu-latest)	1m 40s
tests / py38-test (macos-12)	2m 37s
tests / py39-test (macos-12)	3m 29s
tests / py311-test (macos-latest)	1m 31s
tests / py38-test (windows-latest)	4m 10s
tests / py39-test (windows-latest)	3m 11s
tests / py310-test (windows-latest)	2m 59s
publish / Build source and wheel distribution	3m 59s
	46m 38s

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