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>

cmd/registry/main.go

@@ -18,5 +18,9 @@ import (
 )
 
 func main() {
+	// NOTE(milosgajdos): if the only two commands registered
+	// with registry.RootCmd fail they will halt the program
+	// execution and  exit the program with non-zero exit code.
+	// nolint:errcheck
 	registry.RootCmd.Execute()
 }