build

Implement task.resume (#218) #667

Job	Run time
check-format	5s
build (windows-latest, --c-compiler cl.exe --cxx-compiler cl.exe)	3m 52s
build (ubuntu-latest, --c-compiler gcc --cxx-compiler g++)	2m 37s
build (ubuntu-latest, --c-compiler clang --cxx-compiler clang++)	3m 28s
build (macos-latest)	2m 30s
Gated Commits	1s
	12m 33s

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