Build CHT Conf and test against node versions

fix(#26): move `warnIfDirectoryIsNotEmpty` to `sync-fs.js` #1020

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Run time

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Job	Run time
Build for Node version 8.x	1m 11s
Build for Node version 10.x	1m 9s
Build for Node version 12.x	1m 9s
Build for Node version 14.x	1m 13s
Build for Node version 16.x	1m 13s
Build for Node version 18.x	1m 17s
	7m 12s