Merge pull request #58 from braingram/release_0p3p0 #279

Job	Run time
Run asdf-astropy development tests	33s
Run asdf-astropy development tests	2m 25s
Run asdf-astropy development tests	2m 25s
Python 3.12 Schema validation tests	2m 36s
Python 3.12 Schema validation tests	2m 34s
Python 3.12 Schema validation tests	2m 55s
Python 3.11 Schema validation tests	2m 21s
Python 3.11 Schema validation tests	2m 19s
Python 3.11 Schema validation tests	2m 24s
Python 3.10 Schema validation tests	2m 37s
Python 3.10 Schema validation tests	2m 35s
Python 3.10 Schema validation tests	3m 20s
Python 3.9 Schema validation tests	2m 37s
Python 3.9 Schema validation tests	2m 34s
Python 3.9 Schema validation tests	3m 35s
Twine check	39s
Twine check	39s
Twine check	39s
Code style checks	53s
Code style checks	53s
Code style checks	53s
macOS	2m 35s
macOS	2m 32s
macOS	3m 36s
Windows	2m 25s
Windows	2m 23s
Windows	3m 26s
	59m 23s

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