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Release 0.1.3: the macOS in-app update that actually completes #211

Job	Run time
Racket core (contract tests)	1m 31s
macOS host (x64 build)	12m 26s
Windows host (WinRT build)	5m 43s
Linux host (GTK4 build)	5m 12s
Contract preflight (i18n + release metadata)	7s
macOS host (arm64 build)	4m 56s
	29m 55s