feat(linter): enable errcheck linter in golangci-lint

Also, bump the linter version to the latest available version.

Signed-off-by: Milos Gajdos <milosthegajdos@gmail.com>

registry/registry.go

@@ -102,6 +102,7 @@ var ServeCmd = &cobra.Command{
 		config, err := resolveConfiguration(args)
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "configuration error: %v\n", err)
+			// nolint:errcheck
 			cmd.Usage()
 			os.Exit(1)
 		}