ci: Add dependabot configuration #759

Job	Run time
formatter	15s
linter	23s
test-development-versions-deps	1m 8s
test-latest-version	1m 54s
test-no-erdantic-version	1m 3s
test-stable-versions (3.8, 20, 45)	1m 26s
test-stable-versions (3.9, 20, 45)	1m 24s
test-stable-versions (3.9, 20, 53)	1m 39s
test-stable-versions (3.10, 20, 62)	1m 26s
test-stable-versions (3.10, 20, 70)	1m 26s
test-stable-versions (3.11, 20, 70)	1m 39s
test-stable-versions (3.11, 21, 71)	1m 22s
test-stable-versions (3.11, 22, 71)	1m 37s
test-stable-versions (3.11, 23, 71)	1m 30s
test-stable-versions (3.11, 24, 72)	2m 42s
test-stable-versions (3.12, 25, 72)	1m 30s
test-stable-versions (3.12, 26, 72)	1m 28s
	23m 52s

Provide feedback