Upload CI artifacts on "push" triggers only (#85) #205

Job	Run time
Build & test (minimum requirements)	1m 11s
Build & test (Linux x86_64)	1m 0s
Build & lint sdist	14s
Build, lint, & test wheels (Linux x86_64)	11m 44s
Build & test (no optional dependencies)	52s
Build, lint, & test wheels (macOS x86_64)	9m 36s
Build, lint, & test wheels (macOS arm64)	8m 53s
Build & test (macOS x86_64)	1m 17s
Build & test (macOS arm64)	1m 2s
Publish to TestPyPI	1m 3s
Create a release	0s
Publish to PyPI	0s
	36m 52s

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