[dubboctl] add version command (#746) (#747) #36

Job	Run time
Create Release	3s
Build and Upload Binaries (linux, amd64)	4m 54s
Build and Upload Binaries (linux, 386)	5m 2s
Build and Upload Binaries (windows, 386)	4m 55s
Build and Upload Binaries (linux, arm64)	4m 54s
Build and Upload Binaries (darwin, amd64)	4m 55s
Build and Upload Binaries (windows, amd64)	4m 55s
Build and Upload Binaries (darwin, arm64)	4m 53s
	34m 31s

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