Issue when not using "master" for main branch

[cmonte905]

Got an error when the master branch is called "main" and not "master":

panic: GetCurrentVersion failed: failed to get master branch at 'refs/heads/master, 'refs/remotes/origin/master': reference not found

goroutine 1 [running]:
github.com/syncromatics/gogitver/cmd/gogitver/cmd.runRoot(0xcf3140, 0xd282f0, 0x0, 0x0)
	/go/pkg/mod/github.com/syncromatics/gogitver@v1.2.0/cmd/gogitver/cmd/root.go:108 +0x177
github.com/spf13/cobra.(*Command).execute(0xcf3140, 0xc0001121f0, 0x0, 0x0, 0xcf3140, 0xc0001121f0)
	/go/pkg/mod/github.com/spf13/cobra@v1.2.1/command.go:860 +0x2c2
github.com/spf13/cobra.(*Command).ExecuteC(0xcf3140, 0xc000000180, 0x200000003, 0xc000000180)
	/go/pkg/mod/github.com/spf13/cobra@v1.2.1/command.go:974 +0x375
github.com/spf13/cobra.(*Command).Execute(...)
	/go/pkg/mod/github.com/spf13/cobra@v1.2.1/command.go:902
github.com/syncromatics/gogitver/cmd/gogitver/cmd.Execute()
	/go/pkg/mod/github.com/syncromatics/gogitver@v1.2.0/cmd/gogitver/cmd/root.go:46 +0x31
main.main()
	/go/pkg/mod/github.com/syncromatics/gogitver@v1.2.0/cmd/gogitver/main.go:6 +0x25