Create dependabot.yml #35

Job	Run time
tests / Load tox environments	5s
tests / py38-test-oldestdeps (ubuntu-latest)	1m 1s
tests / py39-test (ubuntu-latest)	1m 4s
tests / py310-test-viz (ubuntu-latest)	1m 22s
tests / py311-test-alldeps (ubuntu-latest)	1m 15s
tests / py312-test-devdeps (ubuntu-latest)	1m 21s
tests / py38-test-oldestdeps (macos-12)	1m 3s
tests / py39-test (macos-12)	1m 12s
tests / py310-test-viz (macos-latest)	1m 0s
tests / py311-test-alldeps (macos-latest)	52s
tests / py312-test-devdeps (macos-latest)	52s
tests / py38-test-oldestdeps (windows-latest)	2m 11s
tests / py39-test (windows-latest)	1m 45s
tests / py310-test-viz (windows-latest)	2m 10s
tests / py311-test-alldeps (windows-latest)	2m 0s
tests / py312-test-devdeps (windows-latest)	2m 12s
tests / Upload Coverage	3s
	21m 28s

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