Build

rtcheck: Test MultiOutSynthPlugin first #304

Job	Run time
Pluginval Build (Linux, ubuntu-latest, pluginval, ./pluginval, ubuntu:24.04)	17m 1s
Pluginval Build (Windows, windows-latest, pluginval.exe, ./pluginval.exe)	23m 21s
Pluginval Build (macOS, macos-15, pluginval.app, pluginval.app/Contents/MacOS/pluginval)	6m 38s
deploy	0s
	47m 0s

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