Drop Python 3.7, use cibuildwheel v3 for Python 3.14 support #136

Job	Run time
lint	54s
package-sdist	16s
package-wheel (ubuntu-latest)	15m 22s
package-wheel (macos-latest)	5m 36s
package-wheel (windows-latest)	3m 47s
test (ubuntu-latest, 3.8)	4m 40s
test (ubuntu-latest, 3.9)	5m 47s
test (ubuntu-latest, 3.10)	5m 44s
test (ubuntu-latest, 3.12)	3m 22s
test (macos-latest, 3.8)	7m 26s
test (macos-latest, 3.9)	8m 31s
test (ubuntu-latest, 3.11)	5m 46s
test (macos-latest, 3.10)	11m 14s
test (windows-latest, 3.9)	12m 58s
test (macos-latest, 3.11)	8m 21s
test (windows-latest, 3.12)	12m 4s
test (windows-latest, 3.8)	15m 8s
test (windows-latest, 3.10)	12m 45s
test (macos-latest, 3.12)	8m 36s
test (windows-latest, 3.11)	12m 22s
publish	26s
	2h 41m 5s

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